SCIENTIFIC ABSTRACT KIRENSKIY, L.V. - KIRENSKIY, L.V.

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• Collection: Scientific Abstracts
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• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: September 18, 2001
• Sequence Number: 17
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

--,2-,723
S/13q/6j/ooo/oo4/oi6/o23
Deternination of the optical ... E032/E311,
Acknowledgments to Assistant A.M. Caulyavev and L.P, Pavlov who
supplied the germanium films which were used in dn experimental
check on the theory. There are 3 figures and 3 Soviet referenc,I.S.
AS SOC. I AT I ON I AA im DzerzhInskogo (IAA im Dzerzhinshiv)
w~]~ovskiy energetichoskiv institut
0io.9c ow Power - engineering Ins t i t tit v)
JaIlliary 28 1960 (initialiv)
I I v 1,)61 (after revistonl
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AUTHORS: Kirenskiy,:~-,--Y., Buravikhin, V. A., Kan, S. V, , and
D-e&~-ar--e-v, I. F.
TITLE: Domain structure of thin ferromagnetic films
PERIODICAL: Akademiya nauk SSSR. Sibirskoye otdeleniye.
Izvestiya,.no. 5, 19619 3-9
TEXT: in. recent. years,. a-series of -theoretical-and. experimental
investigatious..have.been-carried-out.ou..the-domain.structures
and..the.structures.-of-domaiu-shells.in.thim ferrormagnetic filvis
by.T.-Kaczer.(Ref. 4: K Domduove.strukturd tenkfch ferromagnetyc
Icych vrstev, deskolovensk3f-dasopis.pro fysiku,.7,-516 (1957),
I-N. Shklyarevskiy.(Ref..18:-K.voprosu..ob..izmerenii tolshchin
tonkikh plenok..B...pamoshch!yu.liniy-ravnogo-.khromaticheskogo
poryadka,.-t..."Optika.i.Spektroskopiyal-',,-5,.617 (1958), L. V.
Kirenskiy,,.I-.F-.Degtyarev-(Ref!.-19:.O.temperaturnoy-ustoychivosti
domenuoy-struktury.-v.kristallakh-.kremnistago zheleza, ZhETF., 35,
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Domai n stx=ture...
3, (9), 584..(1958)), R. M..Moon (Ref. 15: Internal,structure of
cross-tied walls..in.thiu..Permalloy..films-through-highr:resolution
Bitter.techniques,.j,-Appl. Phys.,.30,,82, 1959),.1. B. Gomi,
Y. Odani (Ref . 16: Chain. wall in.-Permalloy -Thin Films, j. of the
Phyaical.society.of-Japan,-15,.3,,.535, 1960) and.C. E. Fuller
(Ref..17; Domains patterne.and,,revereals.by.wall.movements of
thin films.of.iron-and-nickel iron,,..J. Phys.1, et.radium, 20,
No. 2-3, 310,,1959). -The.study of-thin.films-opens.up,the possi-
bility..of-applying.-known-.microscopic-methods--of-investigation in
the-study..of.microscopic-properties-of matter.-.Investigation of
ferro-magnetic-properties-of..thin.films.could-be useful.in clari-
fying problems-of ferro-magnetic.theory.and here.provide useful
data.for massive.ferrormagnetic.samples..,Detailed study of
space.distribution..of.self-magnetism in.thin.ferro.!..magnetic
films appears.an.important.stage..on.the way to developing the
theory.of.technical.magnetization.. The practical study of the
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Domain structure...
properties.of..thin..ferro.~magnetic.films..could.lead.to.perfecting
the-"memory" elements..of.-modern..computers-..Mainly..due to their
comparatively.simple-production-and-.better rate of.demagnetiza-
.tion they have,important.advautages.over ferrite cores in com-
puters. The.study of-the.configuration-.of.the.domain structure
of.ferro..-magnetic-films ahd..its-.dependability..on the technology
.of.preparation,.chemical-composition..and-thickness,-and.also the
change-of domain-structure.in-the.magnetic.field,.could.provide
the-best-choice.of-l~nemory".elements-of-computers..and electronic
L
machine s_ _.Mis sing.-from. -most- of.. tbe.. work.. already. done in the
study of domain-structure-of-thin-ferro~.-magnetic.films, is the
effect.of-technology.of-film--preparation,.film.thickness on the
-configuration.of domain-.structure-and,.also-film.changes in the
..process of.magnetization-and.demagnetization. -The present work
deals.with.the..effect..of.the..technology of.-preparation and
.thickness,of.the.film.of.alloy-consisting..of-80% nickel, 17%
iron, and-3% molybdenum.on..the-configuration.of their domain
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Domain.structure...
structure-as-well.as,tbe-change in film domain-structure of this
JV
alloy.and..also-of-the.alloy containing-90% nickel,-50% iron in
the magnetic.field.. To prepare-ferromagnetic films-a vacuum
device was used,-whose..diffusion.-pump.yields..a..vacuum aggregate
alloys in a.tungsterL-.crucible-and.developing films on.optically
polished.glass.having.the..form.-of..a-rectangle-of..10 x 40 mm,
.8 x 36.mm,- and-also..on-discs-of.2 to-8-mm.diame-ter--.The films
were-placed-in.a.magnetic field.,produced..by-a.pair of Helmholtz
coils.- The.direction of..the.field was.in.the.plane of the films.
The films.of.alloy-Fe-Ni-Mo-were prepared as.follows, (a) Base
temperature-.of.3509C.,.in.a magnetic.field-of-125,100, 75, 50,
25 and.4 oersteds;.(b)..Base..temperature.420, 350, 150 and 500C.,
in,a field of-.100..oerateds;.(c).The films of.alloy Fe-Ni-Mo of
different-thicknesses-from 6150 1 to 140 9, and also films of
alloy Fe-Ni were prepared..at-base-.temperatures.up to 3500C and
in a field of 100,oerateds...The films.prepared in the magnetic
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Domain-structure...
field.possessed-uniform.-anistrophy along-.the,axis which corres-
ponded.to..the-..direction-of..applied-magnatic.field. The thick-
nesses of.the.films-.were-measured.by-the..universal monochrometer
UM-2 by-means.of the..Iines,.of.uniform chromatic order.. Domain
was.investigated.by-themothod..of powder figures with a
magnification of 280-on.the-MBI-6.m"L'croscope and also by the
method.of.Kerrl.s meridian.magneto-optical effect.as.quoted in
Ref-19 (Op. cit.).-.The.powder.method-.enables.the study of
domain structure.at-high magrLification,.the details.of boundaries
and.domains,.and.it-.possesses,.appreciable.inertness. Hence for
--the-study.of-change..of domain-.structure.-with-a rapidly changing
field,.the.uon-inert method-of.Kerr.'s-meridian magneto-optical
method.is.used.whicb..unfortunately..does--not.enable.study at
high.magnification-..To..use.thia-method,.-tbe ferro-magnetic film
heated-to 2500C. was covered in..vacuum with a thin dielectric
layer of..zinc.sulphide.- This..d2creases.the destructive effect
of temperature on the.anisotropy of films..and during covering
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Domain structure-.,
with.sulphide..a.magnetie.field-of 70 oersteds.was.applied paralleL
to.the direction-of-the field.used during..the.evaporation of metaL.
The dielectric.layer-appreciably,increases the.deflection angle
of.plane.polarized light and this-increases the contrast between
adjacent.domains-making.visual.inspection.possible.. Subsequent
work-over three.months has.not-detected..any change in the behavior
of.domains and the.zinc..sulphide layer. ..The.ferm-magnetic films,
.prepared on-the basis.-of heating-above.2000C possessed a time-
stable domain-.structure,-mechanical,strength..and chemical stability.
The domain-structure.of.ferrot-magnetic..films depends-largely on
the demagnetization-conditions.....Increasing.the-angle.between the
demagnetizing,field.and.the magnetization.axis,.the.structure
becomes.very fine, the.direction of domain.boundaries usually
following.the-magnetization axis-.-The domain.structure also
depends on-the demagnetization.rate of films. The most correct
structure.is-obtained.at.slow-demagnetization; a high demagnetiza-
tion rate gives large domains and.their structures are less con-
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Domain structure ...
trollable.. A decrease in-the-thickness-of ferromagnetic films
gives.rise-to a.tendency-to..bend.-the--boundaries..and to.give boun-
daries-with.cross-connections.--The.study-of the-magnetization
process-indicates..tbat-it..proceeds..as-.follows: (a) For.the.thick-
ness (about.500f-700.1t) and-for..dissimilar.films,-the-domains grow
along,the-orientation-of-the.-applied-field,.with clear-cut.boun-
daries-;.(b)..corresponding..-films..with..thicknesses.greater than
1000-A.change.in-domain-structure,.occur.aloug-tlie.axis of the
magnetizing. field. and-a-mixing-of-boundaries takes place. When
magnetizing at.an angle.of 451, it-could-happen.that the motion
of boundaries-does..not.occurl.but.inside.the poorly-oriented
domains,.-the.-bending.of..magnetic-vectors-results,,-gradually
gripping--all-.domains;..ou-.the-other-hand-magnetizing.at.an angle
of 900,.the boundary-.mixing..does-.not.take.place..and.magnetic
vectors-turn..smoothly-toward.the-direction-of.the.field. The
reverse-magni--tizatiou-.process-usually.starts-with-clearly
defined nuclei,.the.growth-of.which..is.analogous to the.magneti-
zation.process. There.are.9 figures.and.19.references: 3 Soviet
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Domain.structure...
bloc.and-16.nonrSoviet-bloc...The-references to the English-
language.publications-read-as-follows:~I. By. Gomi,.I Odani,
Chain wall.in.-Permalloy-Thin-Films,.j. of.the Physical society
of Japan,.15, 3, 535v 1960; C. E. Fuller, Domains patterns and
reversals.by.wall movements-of-.thin-films-of iron-and nickel
iron,.j..Phys.,.et.radium,.20,-No.-2-3, 310, 1959;.M. Prutton,
The observation-of domaiu..structure.in-magnetic.thin films by
means..of the.Kerr-magneto?!optia effect,, Philos. Mag.,-4, No 45,
1063, 1959; and-H. W. Fuller,.H. Rubinstein, Observations made
on domain-walls.in.thin.films.,.j.Appl. Phys., 30, 84, 1959.
ASSOCIATION: Institut fiziki,.Sibirskogo.otdeleniya.AN SSSR gos.
Pedinstitut,..Krasnoyarsk..(Itistitute of.Physics,
Siberian.Section,-AS.USSR, State Ped. Institute,
Krasnoyarsk)
SUBMITTED: -August 12, 1960
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AUTHORS- XirPnqkiy,,-LY.) Drokin,
Sainlin, R,P. A,I., Cherkashin, V.S., and
TITLEi Ideal magnetisation curves of ferre-magnetics
PERIODICAL. Izvestiva vyashikh uchebnykh zavadeniy, Fizika,
n-- -5, 1961, 78-83
TEXT. The con~-qpl Gf art idrial hysteresis-less magnetization
rurve of ferromagnet%cs has existed f~r A long time. Various
methoda of I)rodu(- ? ng
., th,,~ idea' c.,arvea ha-.e been used, such an
application to iho.- spe~~Lmen of d,:, and a,.,. with amplitude
dp:reasing t,,) dppl!'atlon cf sur-sessive heating and cooling,
and also magnet-: shn:k, it wae considered that these various
kinds of treatrnr-nt woL~ld suffice *o establ-sh a condition of
parallel magns-ti-,at-on -.-i neighbtw:ng ferromagnetic domains.
Thp problem of vh,~,,hpr or not ideal urves produced in different
ways coinctdp haq qt-.1; not bpen re3olved e.nd this was the object
of the present inve,.11'.'gatior- The ideal zvrves were obtained by
applying to thf- sl)e:,-mpn direct and alternating fields of
amplitude dtminishing to zpro hv -;11,7anoni-, mezhani--al shaking
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E194/E135
and rapp4ng and by temperature variation, heating the sample to
temperatures bcth below and above the Cure point followed by
cooling to the initial temperaturps, For ttmppratures below the
Curie point the process wam repeAted fo--jr t.mea. The tests were
made with the materials listed in Table 1, Sample 4 was highly '7c-
work hardened. These tompositions were choiipn because they had a
fairly wide hvsteresiq loop and Lomparative.i 'y low Curie points.
No special heat treatment was applied bf,;~auj;e this would narrow the
hysterea-ts loops and reduP the differences between materials.
Measurementg were madt- in a var%iat astatic magnetometer,
Kondorskiy-s indicn*ion that the method of ctemagnetisation could
affect the shape of the magnetisation curves was found to be true
in practice. Azcordingly, before every measurement the samples
were demagnetised by heating to the Curie pcint followed by
cooling in the abs?ni:e C', a mAgnetic field, Fig.2 shows graphs
of the relat-.on between the magnetisation and field for the
ni--kel spectmen Nol The initial curve No,l lies below all the
others and only At high ftelds dces it intersect curve 2, which
was produced by ultra-gron:.t, me-,.hanizal treatment: curve 21 was
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obtained hv me..-hanz al' tre.-%^~ment wh-l!ft reducing the magnetic
field- The turve -.ould not be obtained by ultra-
Ronic treatment be.-.auaz uhan the :reatment was made more intensive
the specimen fatl,-J, Cur-)-o, 3 waa obtatned oy temperature cycling,
heating f-~~m 20 to 25:0 'IC and :*e_,c-:,2.!ng to 20 OC, Curve 4 was
obtained by app.`ying tc the ape-imnn An A!~Irnatl *nw, fiPld
diminiRti,ng ta Very s!.milar curvpx wire ob-atnpd for
namplel Nns2 2 and 3. Et we.,% --onfirmed on tample No.4 that
hysterps.trilesjp _cur%4-A obtained --n dif!-erpri, wAys approach one
a-ather And cnirzidtt i.f uniform mec-han~.-.al ttretAas. wilthin the
I%ma--; ar,, applied to the oampap dui -Ing 4hp measurements,
*h--~ elaqti: limit, caprojy:%ton CI tht. spr--.Imen extends the
an,i it pf~-skbli- tha! undfr tlig-sr,. :ondit_*ons the
fur,f-f -nLgh^ W.wev6r, thiv we.-ald be
*n chek bp~au~mf- of bqndini; of "he sample. The
hc.wPd *.ha-. me:har.:,e,. trettmen-,% I'mpazt and
~.Otra8~tnjr. osc) !i;A*.1rin) %.,nF-rally Io nni g-,,~ hysteresis-less
:iurvpR, Fv!w~ntlv truch !Pr(.4atmjnt mav not Le euft'izient to over-
;cmt the p,,itwia! i.ne:-g~y oarri- anl to ez-abItsh Parallel
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magnet inat ion !n nF., 1 ;thtouring down ln~i I eint-r at ut v var- A at 11ons
with 5 LM.3 It an f-wvt it ii p Itc at ion of A d ire.- t mtsxn!!t ~~ fle 1d --an give
hysteresisless maq11ctj&at1(.~n turves how-%--. 1113Ual.',y '.hese do
not coincdo- with one anc-thc!r, When unt!-rm me,.han!,al stress is
applipd~ tile hvstf!re%tm cut-ves obia*.npd bv '1*."f!'r11n: methods
coincide in the limit
There are 5 f*Lxixt-~,T., ~ viibtp and 14
I Russian tranqlat,.on f-om non.Sovzet and 9 non-
Soviet-blo_ The Fnv,1'..-qh !_%nv;-tiaxF, !i,ad A-.4 frilows:
Ref.2 3. EwinK, Trans, 1~-v Sr-. , V ..-, I
Ref - 1) .1 U, A ghwo:- t h , f V- 70MJf4r1Pt 1.5171. !,~Indflr !(,x8
ASSOCIATION I ns t t I a t f 'z,,k. SO AN SSSH
( Institute of Physics, SO AS
brasnovarskiv pectirv;t 4,.u*
lhra,in~-~aTl%k Pedar
gc-,vical Institit-1
SUBMITTUD! Vigil,t j. 1960
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D 1145, OL49 9073/E535
AUTHORSt Buravikhin V. A. and Savchenko.M.K.
TITLE: Motion Picture Study of the Processes of Changes in
the Magnetic Structure of Thin Ferromagnetic Film in
a Magnetic Field
PERIODICAL: Fizika metallov i metallovedoiniye, 1961, Vol.11, No.4,
Pp-529-532 + 2 plates
TEXT: Changes in the domain structure of thin films of two
alloys (50% Fe, 50% Ni and 17% Fe. 80% Ni, 3% Mo) were studied by
means of motion picture photograpny, using the powder pattern
method. The films were produced on a pol:.ahed glass bas 1 x lgX40
mm heated to 3500C by thermal deposition --n a vacuum of ; x 10- mmHg
applying an external magnetic field of 100 Oe. In every case the
alloy evaporated frow the crucible in 30 116c, which was taken as
an indication that the composition of the ferromagnetic films
differed only very slightly from the initlal composition of the
alloy. The film thickness varied between 760 and 2470 A. Study
of the photographs indicates that the features of magnetization of
thin ferromagnetic films can be summarized an followst
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1 The domain structure of all ferromagnetic film remains stable
U~kil the magnetic field reaches some critical value;
2. In relatively thick films, magnetization occurs with inter-
mittent displacement of domain boundaries when the magnetic field
reaches a critical value;
3. No boundary displacement was observed in thinner films;their
magnetization takes place by destroying domain boundaries and, in
some cases, there was a change in their structure or
appearance of new boundaries, which sub-divided the unsuitably
oriented domains into individual sub-domatna. There is also a
change in the structure of the main boundaries. There are
4 figures and 8 referencest 2 Soviet and IS non-Soviet.
ASSOCIATIONSt Institut fiziki SO AN SSSR I
(Institute of Physics SO AS USSR);
Krasnoyarakiy pedagogicheskiy institut
(Krasnoyarsk Pedagogic Institute)
SUBMITTEDt September 10, 1960
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B104/B201
AUTHORS: Kirenskiy, L. V. and Buravikhin, V. A.
TITLE: of mode of production and thickness of thin ferro-
magnetic Fe-Ni films upon their domain structure
PERIODICAL: Akademiya nauk SSSR. Izvestiya. Seriya fizicheskaya,
v. 25, no- 5, 1961, 569-573
TEXT: The present investigation was the subject of a lecture delivered
at a symposium on thin ferromagnetic films (Krasnoyarsk, July 4 to 7,
1960). The authors studied the effect of production conditions, thick-
ness, and annealing of films alloyed with 80,; Ni, 17 Fe, and 3"' Mo upon
their domain structure. he alloy was sputtered from a tungsten
crucible in vacuum (7-10-T mm Hg) onto polished glass plates (1-10-40 mm~
in the presence of a magnetic field produced by a pair of Helmholtz coils
and the direction of which coincided with the film plane. Films were
prepared under the following conditions: (1) the base was heated to
3500C, the magnetic field strengths amounted to 125, 100, 75, 50, 25, ant
4 oersteds; (2) at a field strength of 100 oersteds the bases were heatet
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Effect of mode of production ... B10i,'YL-201
to 420, 350, 150, and 500C; (3) films of thicknesses ranging between
6150 and 140 a were prepared at a base temperature of 350 OC and at
100 oersteds. The film thicknesses were optically determined, while the
magnetic powder method and a microscope served for determining the domain
structure. The direction of magnetization in the films coincided with
the direction of the magnetic field during production. The part played
by the angle between a demagnetizing field and the direction of easiest
magnetizing of the film was studied. The number of boundaries was found
to increase on an enlargement of this angle, while their direction was
conserved. This direction coincides with the direction of the magnetic
field applied in the process. At 125 oersteds the boundaries are almost
straight and parallel, whereas they become increasingly curved with
dropping field strength. Films produced on a backing kept at a tempera-
ture below 1000C, were brittle and oxid zed quickly. In addition, films
with thicknesses between 6150 and 1340 1 were found to have domains with
very straight boundaries, coinciding with th~ magnetic field direction.
Films with thicknesses between 1200 and 800 had somewhat curved
boundaries. These curvatures rose on a decrease o! the film thickness.
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Effect of mode of production B104/B201
They are explained by the heavy magnetization at-exiguous thicknesses,
in connection with the weakly marked uniaxial anisotropy, the low satura-
tion, and the trong inhomogeneity of the film at the edges. Films 530,
880, and 1200 ~ thick prepared 0at 100 oersteds on unheated backings, were
annealed for some hours at 450 C in vacuum (2-10-5 mm Hg) in a magnetic
field of 500 oersteds. The direction of this-field was in the film plane
and it was oriented under various angles to the direction of easiest
magnetizing. The latter direction was proved to shift to the direction of
the magnetic field applied in the annealing proceas. There are 3 figures
and 9 referencoo: I Soviet-bloc and 8 non-Soviet-bloc.
A6SOCIATION: Institut fiziki Sibirskogo otdeleniya ~kademii nauk SSSR
(Institute of Physics of the Siberian Department, Academy
of 5ciences USSR), Krasnoyarskiy goo. pedagogicheskiy
inatitut (Krasnoyarsk State Pedagogic Institute)
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B1041B201
AUTHORS: Kirenskly, L. V. and Buravikhin, V. A.
TITLE: Domain boundaries of thin ferromagnetic films
?ERIODICAL: Akademiya nalak SSOR. Izvestiya- Seriya fizicheskaya,
v. 21;0 no. 5, 1961, 574-576
TEXT: The present investigation wan the subject of' a lecture delivered
at a symposium on thin ferromagnetic films (Krasnoyarsk, July 4 to 7,
11/60), The authors cond'iieted an experimental otudy on the polarity of
bounduries of thin rerromagnetic filas differing on to ~ompoaition and
thickness. Thin films of ferromag -,, Fe,
,netic iron, cobalt, and 80," Ni, 17,
3,"') ",lo alloy were utilized 'Lor the purpose. The films were prepared by
').10 0
sputterinj in vacu,= (,. -~ mm Hg) onto a glass backing heated to 350 C.
The uniaxial anisotropy was brought about by a mrignetic field (100
oersteds) during the sputtering process, The boundaries were determined
with the aid or magnetic powder suspensions in a microscope. As in shown
by micropictures. tie domain structure consiats, i~ no magnetic field is
applied durinG the microacopic examination. cof almost plane-parallel
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Domain boundaries of thin ... -2
2
04/2 -
domaino with distinct. thin adges. If a magnetic field (220 oersteds) is
applied in perpendicular to a film surface. more magnetic powder particles
gather on a boundary of a domain. If the magnetic field direction is
chani;ed by 1800. more particles gather at the boundary at which there were
less particles before, and vice versa. Tnis in convincing evidence of the
alternating polarity of the Bloch walls in thin ferromagnetic films. This
observation is generally not made on manolive forromognetic crystalliten.
This change in polarity is observed not only on utraight, right-angled
boundaries, but on zigzav, boundaries as well. In case of cobalt films and
films of the abovementioned alloy, Ne"el boundaries were enta lished on
films less than 500 ?, thick and an ircn films less than 25u ~
L A thisk. The
particles are uniformly noncentra~ed on these boundaries. The double
boundaries appearin6 when applying a magnetic field orie ted in perpendi-
cular to the film are demonstrated on pictures of a 560 ~ film of the
alloy. If the maGnetic field is absent, the boundaries will be thick
lines. When applying a magnetic field (110 oersteds) parallel ~o the film
plane, a chani~e is observed in the occupation of the double linen by
powder particles. To summarize: (1) double bcundaries in thin ferromag-
netic films are Bloch walls with oppo3ite polarity; (2) Bloch walls of
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Domain boundarien of thin B 10 4 1
thin ferromagnetic films have.an alternating polarity; (3, N'e'el boundaries
appear on a reduction of the film thickness, beginning from a determined
thickness which depends on the film compooition, These boundaries have
no sign-changing polarity. There are 4 figures and 11 references:
1 Soviet-bloc and 10 non-Soviet-bloc. The most important references to
English-language publications read as follows: Nl~el L., Comp. 2end., 241,
533 (1955); 71illiams H.. et al.. J. Appl. Phys.. 28. 549 (191~",:. "uber E.,
et al J. AppI . HiyA, , '29, 294, 't,rc:zer J. ".ppl. ;,~',Yq. , 119,
569 (19581).
A!~SOCIATIOII: Institut fiziki Sibirskrgo cldeloniya ,'~kademii nauk Sss,-~,
(Institute of P~ysizs of the "'iberian _)opartmen~. Academy
c~f Sciences U~;SR), Krasncyarqkiy gos. pedagogichenkiy
inatitut (Krasnoyar-sk O~ate iledagcozit; ID.31_'i~Ute)
Card 3/3

06
25790
5/048/61/02.5/005/004!024
13104/132()l
AUTHORS-. Kirenskly, L. V., Buravikiiin, V. A., and Zvegintsev, A.G.
TITLE: Domain structure and coercive force of thin ferromagnetic
films
-PERIODICAL: Akademiya, nauk SSSR. Izventiya. Sleriya fizicheskaya,
v. 25. no. 5, 1961, !)77-58(.)
TEXT: The present investigation was the subje,~t of a lecture delivered
at a symposium on thin ferromagnetic -films (Krasnoyarsk, Ju2y 4 to 7,
1960). The authors qtudied the dynamic:3 of' the domair itructures of
ferromagnetic films in a magnetic field and examinivi int.- effect of t1he
film thickness upon the dynamics. A relationship wis ~stablis*,-Aed between
the coercive force and the chaiacter of this dynulic3 The eX periments
were conducted with iron and cobalt films. and wit;, lilms of a nickel
alloy (80~ Ni, 17p Fe. and 3~'u The film7, were prepared by sputterirg
in vacuum (6-10- 6 nm Hg) onto polished glaso, .;Putterin6 book place in a
magnetic field (1,',10 oersteds) produced by a pair of H-.~lmholtz coils, Tie
Card '1/5

25790
:~/003/6 1 /02 5/,-,i;'5/0()4/r)24
Domain structure and coorci-te :3 1 "":" ~~' , , ,
direction of the magnetic field wa3 in the film plane. An axis of
easiest magnetizing was formed as a result, During prcduction of the
films on which tLe domain structure and the coercive force Vvere studied
as functions of thisknes3, the glasu backingp 'r--~re hea-,ed to a temperati.re
of 3000C. Other ~iln,3 were stut'-red a* roo:*7. ternp,,.;iture T~ie lomains
were found to increase wi!h a dirinu'ion of tho film. tt~ickncss, and the
boundary t~- b-~,~cnf- mot-) pronoun-ed. Thv structure Gf the
domains if-, not mo,lified up to a certain critical fit2ld C~rE-ngti; wh--cl: if
dependent upon thc., film thickness. In a field abcvt.~ ti.e critical ;'ield
strength, a ma,~ne-'.zaticn at thicknesses of 86) an,J over causes it
displacement of tourJar'C"I. New bcunllptries. being almost ppi?rpen~icular
to the main boundarien, a 'opear in films rangt-n6 from I.-o 8,-, 1 on an
increase of the field strength beyond the critical one in domains oriented
unfavorably with re-9pect to the field direction. This 13 exlained by a
formation of "subdomaina". No boundary displacements -were established in
films having thicknewies from 5001 to 150 ~. 11.2ubdomainsll und (~ r equal ccn-
ditions as above could be observe,]. Figs. 4 ind 5 graphically present the
coercive forces of the triree film types as fuictions of their thickness.
In Fig. 6, the coercive force for the three fLlm tyies is shown as a
Card 2/5

25790
24
Domain atructure arid coercive ... 1 41 04, Y~0 1
function of the temierature of a vacuum anhealing (I hr) in a magnetic
field of 500 oersteds. i1c results from a diocu3oion of the dia~Srazis,
the coercive force attains a maximum if only on:! domain extends o'ver the
film thickness. Tne diminution of the coercive force with a rise of the
annealing temperature is explained by the elimination of internal film
stresses which are particularly strong in films produced on unheatdd
glass bal6kings. If the direction of the nagnetLc field in the annealing
13rocess does not coincide *viith that of easiest ~nagnetizir.-, the latter
disappears, and a new direction of easiest magnotizing aricos, which
coincides with the direction of the magnetic flold in the annealing
process. There are 6 figures and 10 refe'ren~as 1 "oviet-blac and 9
non-Soviet-bloc.
ASSOCIATION institut fiziki Sibirokogo otdeleriya Akademii naul- SOSR
(Institute of Physics of the Siberian Departmentp Academy
of Sciences LISSR), Krasnoyarskiy E-os. pedagog4cheakiy
inatitut (Krasnoyarsk state iledagcgic Inctdtute)
Card 3/5

AUTHORS. ~irer,.Aiy, V. Fan, j. V. !L.;,i
L
TITLE: ;tuv; of maS gn 1
I . netis of -..ix. '~-rroma-, -4-c film.
a 4A cf trli,
11ERIODICAL: iikadpmiya nauk SS-:R, v., e i Yl :;t-f-ya
no. s, 1961, c5C4-~,Q-
TEXT. T~oo pro~-wr* vim, tr~n ';,-,;burp de'~Ivered
at a o-jmp-,-i;urr or ti.in forromagneti- ri,- y 4 7
. 1 .1 - to 1 9
1960). T~.k- rlwi-li-pmont c-f magne-oc~ptirai b s ervn t i c n o f
-10 m a i n1. v u c 4. u " ~1 ~; I E, f a - r'. y re c c n tH, .! . ,* -- 'A : ~ a 7,7 t, a 1Aiys Rev. , 62~
119 9 51 C. P,- w 1,2 r -.- a I t, hys ov. . 9 4 L. "rulton
(,Philcs. iilag.. A.~ a~-. lo63 liq5a
% " "e. o J n d m- a.-d an apparatwi
for the nb-~iervuticn of ferromagretic 1", i--ab- rcsult3
obtaineJ 'by thi,] i-,,,,-*hr.,d linve been,
deficilcmcios, of' -.i, mawnetic pcivd~-r 7. :--tulies
in thi-, f iold ;iro urum-ra',-~I. aril r,;:iT1 , t1i, I:Y
pre-lent iuti;(.Ir ; mi f r- m~q;n,!~4 i s' r,,,-,tur,2 M 11
Card

21 7~2
J (1(:61024
S t u d y o I t 1, e m ai.-n e t ri_- ' ure
using the lonwit-.1dinal K~,-rr N i c k e
alloy filmz, F-. 3;'v :,'c ) were ul,-u! -,i mm Hg,
on~~, 1~ol ished T,.
p r c J ti.~ . n,; * h o r,,~ t a -j -,~:l i n t h e
film pl_an,~. T'%, ba,-kinj~l fiai !~or the
visual cbserva"or. -ind f'(-;r -i -:i,.n
,.in.- vilfide Iity-- F, I q . T i i fi d
bein,~ orienle] 7 ~3-ar,%o way a- :n6~- I r Ju t c n a ~,.e ferrc-.
magn eti z f J, I m 'A 1 i 4--' ~l ,'2
ii5 aye r i r c r ~.,a z~ j -,f :-:'ntion of
the reflec.-~d v; e ~ 'n
d umaing was alj~~-n-n T.e expprimen-fa` i.1 --.-n--` in ~'ig_
The proportie!j cf 1,ir!ou:-. filins studio!d w It !i t !3 fo"And to
differ. The di:-o-JIon, ~)f ~,aiioat and 'teuvy dotermined
from ttie domain otructui,4! of tine qpt~c~-"Iensl W.Iiic -ifl-r thp filris
were demagnptizfd. 'Tion --inplying a field beini,-
1) rp-Aic,,:1,nr ~o the fie)d
uoed in the pro,lu(~ti-n of tho film. Ili-, ccr.'rast domains
dropped with a ri,:e ~f lii,? fipld jtrongti;. witlicu! *:,, Jcnair, configura-
tion changint., noticeably, or the favorably ori-n'oJ lomainc. ap,.t-a.~ed. TLe
authors discunn f-he effoct: rf di,m~tGnet ;.-.at i~ n *:it- domain
Card 21,1

2
V048 61/025/~05/006/024
~
2 01
Study of the magnetic structure ... 1 C4 j,.

structure, and the modification of the domain structure of filmo duriw
_
the magnetizing process. r,-Io summarize: /1) Avery fine domain struct~t-e
appears on an increase of the angle between the direction of the do-
magnetizing process and the axis of easiest magnetizing of the films;
(2) a structure consisting of coarse domainsq*di`L*fering and undefined in
shape, was established in case of a fast demagnetization. A fine domain
structure appeared on a slow demagnetitation. A 3tud~ of m
etization
indicated that
1
domaino'grow abruptly on thin (500 60D ) and non-
y
uniform films; 2 on an increase of the ii1m thickness and of the angle..
,
~
between the magnetic field and the direction of easiest magnetizing the
domairi boundaries are shi~fed uniformly in'. cause of'uniform films. In.-
case of a magnetization in the direction of difficult magnetizirg the'
configuration of the domains does not change,,but the contrasts between
the domains become weaker and disappear once saturation in attained. The
contrast between the domains is restored inpart when the field is.discon-
nected; (3) if a field with the direction at 450 in applied, a brightening
of dark fields (or a darkening of bright fields) will belobserved. There
are 7 figures'and 7 references: 2 I.-oviet-bloc and 5 non:--Soviet-bloc.
Card 3/4

S//048/61/025/005/006/024
L;tudy of the magnetic structure B104/B201

AIJSOCIATIOIT: Institut fiziki Sibirskogo otdeleniya Akademii nauk SSONJ
(Institute of Physics of the Siberian Department, Academy of
Sciences USSR), Krasnoyarokiy gos. pedagogicheskiy institut
(Krasnoyarsk State Pedagogical Institute)-

V V,

Fig. 1: Scheme of optical arrangement. Legend: 1~.light source; 2, con-
denser; 3, collimator; 4, diaphra&-m; 5 and 6, mirror;-7, polarizer;-
0, specimen; 9, objective; 10, analyzer; 11, prism; 12, observation tube;
13, photobrraphic film.
Card 4/4

AUTHOaS: i:~
TITLF; C
FER I OD I (,A L wt,~
TEXT. T~,
tit a upnpo,~i uin n 0 li j ri r rrria., n,~ i - i c
19 T h,2 si u r 3 ul 41 e n: i
with aid r; I' t ~oi u,141 n 'A I r e f
reversal . Tjlt~~ ;,C~., :j'~I'~ liff~.rrrill f~ 1 1
if; PcIntel co~ f Tro prolu-irjr. -f p.~,: i
itre elescribod ',n t,',,! .'~kal. nnuk.,
oc-r. fiz,, v. nc. 4. P. 84, i v r
ma rk #A I V Ir
,y in p,irt. ng
I a 1-;, c. r. r:.,i . u o n 0 1 1
f
1,2 -,fLL r -' Ye! ri :.L ~.i i -- r:1 c r ~,l 0. .1 Fly
"ard 1/4
0

I
2 S
)
79
~
. 4

st u d y c f t i,,i d n o * ru c t u r- r- c
Ju r I i,.F, 1, rc (I uc r. ~I ri j, I ~j 4 f r v r:7.a
depending upon iritilal :3-n* a j 1:, ~i r. C, t
'observed to ^r. i lt,r~ng fi~,Idi
(up to r~oo :ind i,. ~y rc-tritIcn f
' r'
,
.
l
t i
t h 1 A I
?,
l
f~
M-qgr,.~
I
a w"Iya rp~, ;~, a C,w rr!.t c:n c. ....... . f- r~n
i UM r 1 1
Bri ght w i, d r 1,~.; n,,) u f i -I
080 with tri.. fl*,-*,'Jt'!i r-,f A M.
dire,~' icri of ti:i i "),L n i~ I i - ri
e n e s c. f t t] Ti: . -I a w~ r) i r r v~ w -I
I tchi,
7, w "t Ing Tff -1.~ c n r c, i r.,-,
ne
reversal dependir,,~ n i---
An en"relly d i f f o r,, r + c, a ra ~.7 c~ f -:7
-)f hickneooe~, ur-LiAnd 600 1 r i
direction of ou -, i i,, tizin,,-, i n n -1 r g o an
abrupt marrn,~,t ir rcver.-.-al at a Fiven f,..-:d r. 'had to
olft~rcomc to clutril-,; nu;--,--~~
T h f 1 31 !A J om " I n I z,,, fllmf-, wern
n V
rd 2

r r.
X 1, n '1, 17' r!
ty
7:,i 7r
4 7

r- X

f i
I xir~r ~'i m i. n fa
InI -f"' IL-4-Ir--ril I,' f t r vo v- rt r I C, n
r rt r t~,o

nu,4n -

r.1

AS S OC I AT I (-.1l

v794
5~()41376' 10)510C~/!-.08110,24
C; B I 041"Pr)
AUTHORS: Kirenskiy, L. V., Buravikhin, V. A- ani Sa--,,henkc, F.
TITLE: Modification of the domain stru,:-.ire -f f,~,rrcmavra-ic filmg
in a magnetic field
PERIODICAL: Akademiya nauk SSSR. Izvestiya. Serlya flizicheskaya.
v. 25, no. 59 1964o 596-598
TEXT: The present In7estigation wa3 the subject cf a lecture de',J.7erei at
a symposium on thin feriomagnett,- films (Fraqncyar~lk. Ju:y -~ 7. 19601.
The authors stud4led the beha7ior of' the domn,.n -h-.n f-i'.M,1
A 10 ; an.; -a n
obtained from two a3loys (60;' Ili - 17/ Fe,
a magnetic field during magre-,Ization and magneti-. re-r-mrss CA:'I VL
c. j
ros~.---d by
direction of easiest magnetizing. The domain s,r,,;cturq was
the magnetic pcwder method. The moJifications of *,-.o dcmair. FTructurn
with magnetic reverual weTe recorded by a motion-pii:,--irtl :amnra
(12 pictures per second). These pictures 3hcw that dcirain -,~ructure
of we2l demagnetized 2470 R apesimens of the Fe-11i q'Icy It3 nct mcdified
up to a magnetization field strength of 9.3 cers,~-J-, :r raze of --ansive
Card 1, 3

25794
S/048/6 - 11021-, If,; 0:;1008,1024
Modification of the domain T31 w,IJ32i: -
specimens the displacement of tho dcmain b~lunlar-.e a~' ready at
very low field strengths. A further rise -,f tl-.o f4 ~'. 1e n,;,,
accompanied by a d1splacem-)nt of boundaries nt a ?arytnoz ra*,? 1". --Itura-
tion is attained at 17.6 oerstede, Similar reqult~; rn a
spe,~imen of 1-he same alloy having a lhinkne.3q of 7b?', A, -n
on the magnetic reverzal of Fe-lit films. 'ho latter were f 4,r:?- ma'gn t lZed
lip to saturation. When applying thi rp,,erqe fi-31d no icmain ~5'ru:-fjre
was observed up tc - 3,4 oersted-c. At -i.:, cersted:!
I-oundaries appeared. whish separated the domains ~,,f
Up to -6.5 oerstei3 no modification cf' th!3 lcmain srru:-ure xa-= otser-red.
The wedges grew in a f4eld of oersteds. and their magn",iza---n
coincided with *he field. The domain etructure disapp-ared a-
Films of Fe-NI-Mi'llo ?Aloy, 1200 *~!^,k, were examinel in a magnc--- f.'el'j
which was oriented at angles of 0, 45. and 90 0 to the di-ro,:-Lcn Cf
easiest magnetizing. In the first case they presented no mrjiflza'icn of
the domain structure up to 10-5 oersteds, in the aecond sa5o up 'c
12.6 oersteds. and In the third case up to 15 oersledFi, In ~:assr~ cl' a
slight increase rf the magnetic field 3trength. a qllg~;t dt3p!a:9-,n.?nt ~f
the boundaries wag observed in the first ind in the ---nd or a
Card 2/3

25794
S/048/61/025/005/008/024
Modification of the domain ... B104/-P201
further stronger rise of the magnetic field strength a fast Alignetic
reversal was observed in parts of the domain structure, the magnetization
of which was oriented in opposite direction to the field. In the third
case, a displacement of boundaries was hardly observable. The magnetic
reversal took place by rotational processes. Saturation vas attained
at 11.6, 15, and 15-8 oersteds. To summarize: (1) all ferromagnetic
films display a domain structure that is stable within certain values of
the magnetic field strengthl (2) in relatively thick films 9-he magnetic
reversal takes place by a displacement of boundarie3, which begins after
a critical field strength value; (3) with a decrease of the film thickness
magnetization occurs in a determined field strength range by boundary
displacement and rotational processes. In very thin filmn magnetization
occurs by very fast magnetic reversal of unfavorably oriented domains.
There are 4 figures and 7 refernnces; 1 Soviet-bloo qn6 ~. non--o-riel-b1cc.
ASSOCIATION; Institut fiziki Sibirskogo otdoleniya .~',kad-!.raii nauk S531i
(Institute of Physics of the Siberian !academy
of Sciences USSR), Krasnoyarskiy go,3. pedagcv,iche-,kiy
institut (Yrasnoyarsk State
Card 3/3

25~05
S/046/61/025/C05/019/024
a417700 B!17/B20'
AUTHORS: K'Arenskiy, L. V., lgnatohenko, V. A . and Baklarov, 0 G,
TITLE: Ferromhgnetic resonanoo in thin films
PERIODICAL: Akademiya nauk SSSR, Izvestiya Seriya fi?1:hqskaya,
v., 25, no, 5. 1961, 640-642
TEXT: The present investigation was the subjqot of n lecture delivered at
a symposium on thin ferromagnetic films (Krasncyarsk, july 4 to 7, 1960)~
The phenomenon of ferromagnetic resonanre was used fcr measuring the
saturation mapnetization and the anisotropy constant cf thin ferromagnetic-
films. A blook diagram of the system used for the purpcee is shown in
Fig~ 1,. The superhigh frequenoy vibrations generated by a 430 (431)
standard generntor sire modulated by the re7tangular pulses from generator r.
The chain consisting of a tee junction H. . a deteitor D an amplifier, and
an oscilloeccpe serves for supervising the ganqrAtor operation. The main
part of the superhigh frequency power Inciiea upon aperture S which
connects the resonant chamber to the wavegulds 31rcuit A cylindrical
Card 1/ 5

F.!rromagnetic resonance in thin films
25805 3/048/61/025/005/019/024
B117/B201
chamber with TE1, mode is utilized. The disk-ehaped specimens are placed
at the rear chamber wall The reflected s8ve reaihing the detector D2 via
.'unction H2 is measured. To a-.igment the senaltivity of the system, the
ground level. of the signal from the dete,~tor D2 is compensated by the
oppusite phase of the signal from dc-%4ctor D... The differenne of these
signals is transmitted to the amplifier, and, Bubsequenily, to the
detector which had been aynihronize4 by the P111S03 coming from the
generator r, The amplified and rectifled signal is recorded by galvano-
meter A, Oscilloscope 02 controls the work of the phase detector and of
the compensator, The resonant chamber is placed Into a constant magnetic
field which Is oriented in parallel to the film plane and in perpendicular
to the magnetic component of the superhigh frequencj field The eleotro-
magnet is fed by a stabilized YWT-1 (UIP-.I) souroe- The thin films were
prepared by cathode sputtering in vacuum (,VIO,5 mm Hg) Disk-shaped cover
glasses 18 mm in diameter served as backinga., The backing temperature
during sputtering was about 3001C To create an artificial anisotropy a
q
constant field of -,jIOO oe is applied in the film plane during sputtering,
Several permalloy films (80 % Ni, 17 % Fe, 5 % Mo) nnd a cobalt film were
Card 2/5

S',~)(084'085/61/02 5/00 5/019/024
Perromagnptic resonance in thin films B117/B201
examined. The permalloy compositio n was not controlled after aputt~rings
The film thickness was determined with the aid of a YM-2 (UM-2)
monoohromator by the method described by I,)N. Shklyareyakiy (Ref- 4'.
Optika i apektrookopiya, 5, N2 5, 617 (195 )- Sputt.aring took plaae at.
high temperatures. Since the coefficients of thermal expansion of metal
and backing during cooling are unequal, radially symmetrical elastic
stresses arise in the film. The active demagnetizing fields corresponding
to them were calculated by V. R. MacDonald (Ref. 5: Proo. Phys. Soc.,
.664, 968 (1951)) and J. H. E. Griffiths (Ref. 1: Physics.' 253-0951)).
'General formulas for the effective fields of cryetallograp~io' anisotropy
were obtained by MacDonald (Ref. 5) for single crystals, in particular for
.hexagonal ones:
I ((K~' +[2i;) (T.-,rs) +'2Km(3Tt.
7.7
12
Til I(KI + 21(;) (~Iu - y111) + 2.K; (3~11 - r3j)*,r:jj.
.Formally, the anisotr6py of thin films of non-crystallographic origin can
K'2
be expressed by formulas of this type (4), %here K11 and are the
Card 3/5

Ferromaghetic resonance,in'thin films
25005
3104 61/025/005/019/024
B-1 17YB201
effective anisotropy constants. The results obtained from the measurement
of the saturation magnetization of a thin permalloy film have shown a,
qual ,itative agreement of the,saturation magnetization as a function of
thickness with data given in Ref. 3 (Tannenwald P. E., Seavey M. N., J.
phys. et radium, 10, R3 (1959)) for an 80 % Ki, ?0 % Fe film. The sharp
magnetization drop was, howiver, observed with thicknesses larger than
those.of Ref. 3-by one order of magnitude. Possibly, this in to be
explained by the varying chemical cvmposition. Even more likely,- however
an insufficient homogeneity of the films employed is responsible for this
phenomenon. No anisotropy was established on permalloy films, i.e., it
cannot exceed 103 erg cm-3. On the cobalt film (d - 3ZOO 1) the resonant
field was found to be dist4nctly depenlent upon the rotational angle of
the film. The anisotropy constant K, can be easily calculated from
1 a , ,
formula if assuming 0. In this case, H -(2K,1/19) -175 oe. When
assuming that J. W 1.42-10 it follows that K,1 - 1.24-105 erg cm-3.
T. A. Stepanova is thanked for her assistance. There are 3 figurei 'and."
5 references: I Soviet-bloo and 4 non-Soviet-bloo.
Card 4/5

2580
S/048/61/02 5/00 5/01-9/02
Fepromagnetio resonance in thin films B117/B201
ASSOCIATION: Institut fiziki Sibirskogo otdoleniya Akademii nauk SSSA
r
(Inatitut:,of,?~ sios of the Siberian Departmentp Academy
of Boieno u BR~
Card 5/5

S/04 61/025/012/OCI/022
B116YB138
AUTHORSt Spivak, G. V., Kirenskiy, L. V., Ivanov, R. D., and Sedov,
N. N.
TITLE: Development of mirror-type electron microscopy of magnetic
microfields
PERIODICAL: Akademiya nauk SSSR. Izvestiye- Seriya fizicheskaya, v. 25,
no. 12, 1961, 1465 - 1469
TEXTs The authors present electron-optical photomicrographs of domain
structures of various ferromagnetic materials and compare them with powder
patterns. The distribution of the local magnetic fields scattered by the
specimen is obtained from the contrast. G. V. Spivak, 1. N. Frilezhayeva,
and V. K. Azovtsev (Dokl. AN SSSR, 105, 965 (1955)) were the first to re-
commend the elbctron mirror for photographing magnetic microfields. They
carried out their experiments at the laboratoriya elektronnoy optiki MOU
(Electron Optics Laboratory of MGU). The electron mirror has the following
advantages over the methods of secondary electron emission or photoeffect:
high field sensitivity (the illuminating electron beam is stopped by an
Card 1/4. ,

Development of mirror-type ...
5/04 61/025/012/007/022
B116YBi3e
electric field in front of the specimen, i. e. "probing" of the spatial
field structurej high contrast,due to the forwards and backwards motion of
the electronj and the possibility of examining the magnetic structure at
different distances from the source of the microfield. The optical system
can be traversed by both slow and fast electrunn, A 50-kv voltage focusee
the reflected electrons and enhances the resolving power of the instr-ument.
Domnin structure electron-mirror pictures of a PbO(Fe 20 06 crystal magnifi-
cation: 400, 800, and 1500), cobalt (400 and 600). and a cobalt film
(-1000 R, 400 times), were in good agreement with onen produced by the
powder method (400). The local magnetic fields were determined from the
contrast. Calculations hRve shown that the contrast depends on the product
Hz (z - extent of the H-field). The magnetic field decreases almost ex-
ponentially. Results are shown in Fig. 6. Finally it in noted that magne-
tic fields can be examined under an electron mirror microscope and that their
their strength can be measured at different distances from the specimen,
The magnification here achieved (about 2000) can be further increased,
There are 6 figures and 7 Soviet references.
Card 214~

8/04,1/61/02!;/012/OOT/022.
Development of mirror-type#se
ASSOCIATIONs Piziohnokiy takulltet Mookovakogo goo. universiteta im. It. V.
Lomonotiova (Division of Physics of Moscow State University
imeni M. V* linmonosov)t Institut fiziki Sibirskogo, otdeleniYa
Akademii nuuk OSSR (Institute of Physics of the Siberian f
Department of the Academy of Saiencee USSR)
Pig. 6. (a) Field above the artificial speciment measured with a bismuth
-Z/zo
micrometer at different magnetic biasing currents H a H 0 1 (b) mirror':
0
calibration ourvel (a) scattering field above the hexagonal plane of the
0#02 mml (d) scattering field'above the hexagonal,
PbO(Pe 0 ) crystal, so
2 3 6
axis which is nearly parallel to the cobalt facet so a 0.05 mm. Legendt
0 is a constantp B afid B "a the various degrees of brightness on the
a 1 2
noreeno
Card 314
3

604
S/04 1/025/012/009/022
2~ B1 16%138
AUTHORS: KjEeAvkiy,_jj_,, Vt, Drokin, A. L, Dylgerov, V. D., Sudakov,
N. I., and Zagirova, Ye. K.
TITLEs Temperature dependence of the first anisotropy constant and
magnetic structure of J.ron-manganese ferrites
PERIODICALt Akademiya nauk S38R. Izvestiya. Seriya fizicheskaya# v. 25,
no. 12, 1961, 1472 - 1476
TEXT: The temperature dependence of the first magnetic anisotropy con-
stant K1 of an iron-manganese ferrite single crystal was studied in the
(100) plane, and its domain structure in the (110) plane. Balls 4 - 8 mm
diam were made from specimens grown in a Verneuil's apparatus from MnFe20 4
with manganese excess (25% Mn3 04) by A. A. Popova at the Institut
kristallo fii AN 333R (Institute of Crystallography AS USSR). To find
Ki and K, T) the torques acting on the specimen in a uniform magnetic
field were measured on an Akulov anisometer with a slightly modified strain
gauge (error in measurement,S, 2%). Torque curves were first recorded in
Card 1A

31604
5/048/61/025/012/009/022
Temperature dependence of the first.... B116/B138
different fields at room and oxygen temperatures, as a function of the
angle between the direction of field and this [106] axis. Then the contin-
uous variation in maximum torque in the (Ioo~ plane'was examined
in the temperature range -183 - +3000 - -183 . A fieid strength of 5100
produced saturation, Powder patterns were produced by W. S. Elmore's
method (Ref.119 see below). The graphs show that at 2201 torque is nearly
zero in fields of up to 750 oe- Between 750 and 1000 oe it Increases,
reaching 0.7191o-4 erg-cm-3, after which it remains constant. In fields
of up to 3000 oe there was a sharp Increase at the temperature of boiling
oxygen. The linearity of X, - f(T~ means that the Brvukhatoy-Kirenekly
law holds for this4type. of_drystal also. Extrapolation to absolute zero
yielded to in IT010 erg om 3. The nature of a domain structure is found to
be dependant on the direction of demagnetization. With demagnetization in
the Old direction, the powder patterns in the (110) plane form thickp
parallel lines perpendicular to one of the axes of easy magnetization. A
secondary# wedge-shaped structure between the principal lines, indicates
that the surface deviates slightly from the (110) plans. Domain structure
remains constant under magnetization in the L1101 direction up to 400 cat
up to 600 oe only the secondary structure is changed. Between 750 and
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31604
S/048/61/025/012/009/022
Temperature dependence of the first.... B116/B138
1959 ; Ref- 5: Smith, A. W., Williams, G. W., Canad. J. Phys., 38, 9, 1167
1960~.
~
ASSOCIATIONs Inatitut fiziki SibirBkogo otdeleni.ya Akademil nauk SSSR
(Institute of Physics of the Siberian Department of the
Academy of Sciences USSR), Institut tavetnykh metallov im.
M. I. Kalinina (Institute of Nonferrous Metals Imeni M. 1.
Kalinin), Krasnoyar skiy pedagogichaskiy institut (Krasnoyaruk
Pedagogical Institute)
Card 4/4

3/048/61/025/012/014/022
B110104
AUTHORSs Kirenskiy, -L.V., and Afoshin, V. S.
TITLEt Rotational hysteresis of magnetostriction in ferromagnstice
PERIODICALt Akademiya nauk SSSR. Izvestiya. Seriya fizicheskaya, v. 25,
no. 12, 19610 1492 - 1494
TEXTs Rolled polyorystalline nickel with a reduction from 3.3 to 1 mm
was used to study the rotational hysteresis of magnetostriction (RHU).
The disc-shaped specimen had 18 mm in diamster and was annealed in vacuum
at 11000 C. Rotating the field through 360 with respect to the initial
angle, RHM was determined in the clockwise and counterclockwise directions
after magmetostriction had changed. RUM was measured as a function of
H at fixed values of the angle y and as a function of%f at fixed values
of the field H. First of allp the quantities had to be determined which
permit a quantitative determination of RHMt (1) The dlfferencea~, between
the final and initial values of magnetostriction after the cycle has been
completed. (2) the mean value of RHM (with respect to the area) or its
Card 1/3

S/048/61/025/012/014/022
Rotational hysteresis of B117/B104
relative magnitude CaX)... AO can be determined by the relation
(AA) mean 1/21 21r,,,Ald
Here,?(O is the maximum value of magnetostriction in the direction 0
which conforms with the rolling direction In alitative respect, the
curves of the function4A (R) at f - conai and ZdUA) mean /Ao - f(H) have
been found to agree with the shape of the corresponding curves of the
temperature-dependent magnetic hvateresis. Comparing the curves of
technical magneti2ation with the type of the change of4A(H) reveals a
characteristic partioularitys. In fields whose magnetization is due to a
reversible boundary displacement, both, the magnitudes of&;Lor (4A) a
and of the hysteresis of any other property are small. An increase Th1he
field causes the irreversible displacements to grow and also an increase
in the amount of RHM, which thus reaches a certain maximum value. This
is in conformity with present-day notions on the magnetization mechanism
in ferromagnetics. In strong fields the displacements become less
Card 2/3

/5 Z // 4 71 a
89728
S/02 61/136/003/011/027
B019YB056
AUTHORSi Kirenskiy, L. V., and Buravikhin, V. A.
TITLE: Polarization of Domain Boundaries in Thin Ferromagnetic
Films
PERIODICAL: Doklady Akademii nauk SSSR, 1961, Vol. 136, No. 3,
pp. 575-576
TEXT: The polarization of domain boundaries in thin ferromagnetic films,
which had been produced by thermal deposition of an alloy with 17% Fe,
80% Ni, and 3% No in a vacuum of 2-1 0 -5 mm Ug on a glass substrate and
heated to 3500C, is here investigated. During production, the films were
in a magnetic field of 100 oersteds. The domain boundaries were examined
under a microscope by observing the powder patterns. In this connection,
it was found that in thin ferromagnetic films, double boundaries are
Bloch boundaries of opposite polarity. This is in agreement with the
theoretical results obtained by Kaszer (Ref- 5). Bloch boundaries in thin
ferromagnetic films have alternate polarity, which is probably in
Card 112

89728
Polarization of Domain Boundaries in Thin s/()20/61/136/003/011/0271,/
Ferromagnetic Films B019/BO56
connection with the pre-history of the film.leel boundaries have no
sharply defined polarity but become more distinct only with the .
superposition of a sufficiently strong magnetic field perpendicular to the
plans of the film, It was possible to show in this paper that applying
a magnetio field perpendicular to the plane of the film makes it possible
to draw some conclusions as to the nature of boundary layers in films.
There are 3 figures and 11 referencess 1 Soviet, 2 German, I Japaneseq
and 6 US.
ASSOCIATION: Institut fiziki Sibirskogo Otdeleniya Akademii nauk SSSR
(Institute of Physics of the Siberian Branch of the
Academy of Sciences USSR)
PRESENTED: August 9, 1960, by A. V. Shubnikov, Academician
SUBMITTED: August 8, 1960
Card 2/2

34181
310481621026100210301032
~4 0 B117/BI38
AUTHORSs Kirenskiy, L. V., Kan, S. V., and Savchenko, M. K.
TITLEs Behavior of the domain structure of thin ferromagnetic films
at different temperatures
PERIODICALs Akademiya nauk 333R. Izvestiya. Serija fizicheskaya, v. 26,
no. 2, 19629 310 - 314
TEXTs This paper was presented at a conference on magnetism and antiferro-
magnetism. The authors studied the behavior of the domain structure of
ferromagnetic films at different temperatures. Fe, Ni, Fe-Ni, and Fe-Ni-
Mo films were produoed oby hot metal spraying in a vacuum (10- 5 mm Hg) on
to polished glass (350 0 in a magnetic field of 120 oe. The optical de-
vice used for observation of the domain structure has already been desciited
(Ref. 11i KirenBkiyj L. V Kan, S. V., Degtyarev, I. F., Izv. AN SSSR, Vr
Ser. fiz., 2j, no. 5 (1961jj. The temperature dependence of the domain
structure was studied on a specially designed apparatus (Fig. 1) with which
the temperature in the specimens could be varied between -150 and +650 OC.
To avoid misting and oxidation of the specimen in the chamber the pressure
Card 1/3

343.81
S/048/62/026/002/030/032
Behavior of the domain ... B117/B138
was kept at 10-3 mm Hg during the experiments. In the absence of magnetic
field the domain structure of all the specimens was highly stable. The
behavior of the domain structure at various different temperatures is
largely determined by the magnetic field strength. Uagnetic reversal
nucleation usually occurs in some sections of the film at quite low tem-
peratures. With repeated magnetic reversal they are easily reproducible.
At higher temperatures the number of nuclei increases, they grow, and the
boundaries begin to move more rapidly and smoothly. Then nuclei are formed
magnetic reversal can only be achieved by increasing the temperature. H.
and H0 are temperature dependent. In some materials they decrease as the
temperature rises. The curve for iron films at temperatures above 500 0C
showed an anomalous course, probably due to the different thermal expansion
of base and film. There are 4 figures and 11 references, 3 Soviet and 8
non-Soviet. The three moot recent references to the English-language pub-
lications read as followst Smith D. 0., Electronics, J2, 44 (1959); Murphy
M., Control Engng., no. 10, 38 (1959)1 Olmen R. W., Uitchell E. N,, J. Appl.
phys., 30, 256 (1959).
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34181
8/048/62/026/002/030/012
Behavior of the domain ... B117/B138
ASSOCIATIONt
Institut fiziki Sibirskogo otdeleniya Akademii nauk
(Institute of Physics of the Siberian Department of the
A6ademy of Sciences UPSR)
Fig. 1. Apparatus for studying ib-6-tempe-
rature dependence of domain Atructure.
Legendt (I)-beater (cooler)l (2) ' ''
..bifilar windingl.(3) tube for liquid
.nitrogen and its vaporal (4) vacuum
chamberl'(5) rubber Rackingi (6) glass
dOM91 M-'spsoimenj (8) clamp for
specimenj (9).thermooouplej (10)
heating'cooling coill (11) fastening
screwo
Card 3/3

XIRENSKIY, L.V.; RYABININ, V.P.
Study of the law of approach to saturation on iron silicide single
crystals at various temperatures. Kristallografila 7 no.4s634-
637 Jl-Ag 162. (MM 15111)
1. Inatitut Miki Sibirskogo otdeleniya AN SSM i Krasnoyarskiy
pedagogicheskiy institut.
(Iron silicide crystals)

KT SKTY. Leonli v"jilys ch- MATSONASHVILI, B.N., red.isd-va;
FUL.VIUVAI I.r.0 . red.; YAKAGONOVA, I.A., tekhn.red.
(Magnatiam] Magnetism. Moakva, Izd-vo AN SSSR, 1963. 139
- (MIRA 160)
(Magndtism)

KIRENSKIY# L.V.; SALANSKIY, N.M.; RODICHEV, A.M.
The Barkhausen effect at the approach of the hysteresis loop to
a rectangle. Piz. wt. i metalloved. 16 no.4:630-632 0 163.
N'HM 16:12)
1. Institut fiziki AN SSM.

K I i~Erjjmy , I,. V, ; KlIMET-SOV, V.ye. ; U.,A'I'(;V, V, U ~
(D7nlimic- magnetantriction of Iron] biriamicheskain
nitostrAktrlia zholeza. [n.p.j. All "~SSP . `,ibirskoe otd-
nle. In-t, fizlki, 1964. 21? p. l?:10 )

ACCESSION NRs AP4039406 8/0070/64/009/003/04n/0432
AUTKORSt Antiping Is P.1 lirenskiyj Lo V.1 Saychanko# Us K,
TITLEt The domain structure of nickel ory*talst'assooi&t*d with asohanical
deformations
SOURGEs Kristallograftyal vs. 9# nos 3t 1964t 429-432
TOPIC TAGSs nickelp domain straoturep domain reorganizationp powder methodt
magnotizationt plastic deformation, reorganization irreversibility
ABSTRAM In nickel, in view of the large increase of magnoto-strioture and +,he
small anio~tropio constant associated with an increase in.,stressl a significant
reorganization of the domain structure takes place. The existence of 71 and 109
degree spatial relationships of the domains determines the unique character of this
reorientation. The 'nickel samples used here wore parallelepipeds with a maximum
grain diameter of 4 = selected from a list of electrolytic nickel. The crystals
were chosen with ourraoes lying on or near to the (211) and (110) planeop in
accordance with the criterion of Me Yamamoto and T. Iwata (Soi. Repto Ron lust.
Tohoku Univ. A% 4331 1958; A8t 293, 1956)s Observations were made by the Powder
method. All stresses were unidirectional. Four sets of pictures showed the
Card 1/2

ACCESSION M AP4039408
disappearance of domain structure under stress and its failure to reappear when the
load was removed. Two sets of.piatures dealt with the (211) plane which has one
axis of simple magnetization along which the domain structure lay* Stress was
applied parallel to the domain boundary line in one case and perpendicular in
another. The other two sets of pictures dealt with the (110) plane in which there
are two directions of simple magnetization lying at 71 or 109 degrees to each othere
Stress# in this case, produced at first dendritio domain structures when applied
porpendioular to the original domain. The domain structure in nickel crystals in
very sensitive to mechanical stress. The distinctive property of the domain struo-
ture is it's irreversibility, Even after the action of very small stresses (loss
than 0.01 kg./mm2)j the domain structure did not return to its initial state. The
irreversibility was explained by plastic deformation which probably could not be
observed except by the powder method. Orig. art. has, 4 figurese
SUMITTED i 17Jul63
ASSOCIATIONs Inatitut fisiki SO -AN SSSR (Institute of Pbyeivel 60 AN SSSR)
SUB CODEt MH
DATE ACqi 16Jun64
i0 P" sov, 0~1
ENCM 00
1 0011

ul

KIRTENSKIY, L.V.; SALANSKIT, N.H.; RODICHEV, A.M.
Reversible and irreversible processes in the magnatIc reversal
of an elastically stretched-out iron-nickel polycrystal (Barkhansen
effect appearing as the hysteresis loop approaches a rectangular
shape). Izv. AN SSSR. Ser. fis. 28 no.1:164-168 Ja 164.
(MIRA 171l)
1. Institut fiziki Sibirskogo otdolaniya AN SSSR.

AP4010321
8/0048/64/028/001/0198/0201
AU'rHOR; Kironskiy, L.V.; Patyukovaq Z,M,
-----------
TITLEt Investigation of elastic hysteresis of the thermoolastic affect in nickel
and nicle-silicon alloys Zleports Symposium on questions of Forro- and Antiferro-
magnetism hold in Krasnoyarsk)25 June to 7 July 19627
SOURCE: AN SSSR. Izvestiya. Seriya fizichaskaya, u.28, no.1, 1964, 198-201
TOPIC TAGS: thermoelastic effect, thormo-emf, Thomson effect, stress hysteresis,
hysteresis loop, magnotoolastic effect, nickel, nickel-silicon alloy
ABSRTRACT: The Thomson (thermo-eaf) effect In ferromagnots Is characterized by
some distinctive and interating features connected with the presence in them of.
spontaneous magnetization. There have. however, boon few Investigations of
hysteresis oi the thermoolastic effect, that Is, of the difference between the
thormo-omf curves obtained Lncidont7 to application and removal of stress *in the
case of iron and other forromagnotic specimens. The present work was concerned wilh
investigation of hysteresis of the elastic thermo-eaf In nickel and rAckel-sillem
alloys containing 0.5 to 4% Bi by weight, both in the absence of an external field
Card 1/3

AP4010321
and in the ease of preliminary magnetization of the specimen. The experimental
act-up and procedure have been described earlier by one of the authors (Z.M.Patyu-
kova, IZV. AN *SSSR,Ber. fix. 28,172,1963) (see Abstract ACC MR AP4010316). The results
of the stross cycling experiments for demagnetized and magnetized specimens are
presented in the form of curves. It-was found that preliminary application of a
magnetic field does not change the general character of t1whysteresis up to fields
close to the value for technical saturation, the point at which hysteresis disap-
pears. A residual effect, observed In magnetized specimens, disappears after de-
magnetization of the specimen in the unstressed state and the Initial shape of the
thermo-cmf curves is ro-ostablished. A magnetic field applied prior to application
of the tensile stress loads at first to increase in the area of the hysteresis loop
(to a maximum value in a field of about 38 Oo) and then to rapid decrease of the
area with further increase of the field. In cases of plastic deformation "nega-
tive" hysteresis Is observed. Elastic hysteresis of the thermoelastic effect In
forromagnets may be attributed to Irreversible changeslin the domain structure un-
der.the Influence of elastic stressess Origoart.hast 4 figures.
2/3
Card

AP4010321
ASSOCIATIM Institut fiziki Sibirsknpo otdoloniva Akadcult naukp 38841natituto
of Phy-sics, Siberian Divisions Acadeny of Scieficqs~j- Yeniseyakiy pedag%ichesk.4
institut (Yenivey Vadaeogical Inatitute)
SU13MI7TEDt 00
SUB CODE: Pit
DATI AOQs lO7*b64
NR REP SOV: 008
INOW 00
3/3
Card
OnMR: 000

~ACCESSIOX NR: AP4023405 B/iDO48/64/028/003/0545/0532
'A=OR*. Kirenskly, L.V.; Drokin, A.I.; Dy*lgerov, V.D.; SudAkov, X.I.; Sinegubov,V.1
TITLE: Domain structure in ferrites and its dynamics in varying and rotating mag-
notic fields ffieport, symposium on Farromagnatism and Farroalectricity hold in Le-
ningrad 30 May to 5 Juno 10627
SOWICE: AN SSSR: Izvestiya. Beriya fixichoskaya, v.28, no.3, 1964, 545-552
TOPIC TAGS- ferrite, domain structure, ferrite domain structure, garnet ferrite,
garnet ferrite domain structure, spinal ferrite, spinal ferrite domain structure,
hexagonal ferrite domain structure, double domain structure, domain wall fino*struop-
turo
ABSTRACT: The dom3ln structure of a number of ferrite single crystals having the
garnet, spinal or hexagonal structure was investigated. The powder method of W.B.
Elmore (Phys.Rov.51,10,1092, 1938) was employed to reveal the domains. The polarity
:of the domain boundaries was determined with the aid of the polar Kerr effect, *a-
'ploying a previously described technique (V.D.Dy*lgerov and A.I.Drokin, Kristallo-
grafiya,6,6,9",1960); AoX.Drokin, V.D.Dy*lgorov and B.V.B*znos1kov, Ibid.9,3,465,
Card 1/3

ACCESSION NR: AP4023405
1962). The Yb, Ho, Er and Od garnet forrites were obtained as single crystals from
malts. Lead hexaferrits was also prepared in this way. Crystals of Co-Fe, Mn-Fe and
Ug-ldn ferrites with the spinel structure wore grown in an oxy-hydrogen flaw.
Spheres of 4 to 8 an diameter were obtained. These war annealed above the Curie
point and oriented In a magnetic field. The planes to be Investigated were ground
flat, polished and treated with hot sulfuric acid to destroy surface mosaic. Lead
hexaferrite was found to have a domain structure similar to that of cobalt. The for-
rites with the garnet structure had very complex domain structures, for which it
does not seem possible to construct a model. "Stringy" walls, double banded walls,
land curved walls were observed in different materials. The curved domain walls of
gadolinium ferrite garnet would shift under the influence of an applied magnetic
field. The domain structure of the spinal ferrites was somewhat less complex. The
;presence of double domain structure was established. Successive walls would have
opposite polarity, and In the presence of a gradually increasing magnetic field al-:
~ternate walls would first disappear, the remaining walls disappearing only when the
'field became stronger* Sometimes a single domain wall would separate into two under'
the influence of a field; in such a cas,a the two now walls would have the same po-
larity as the old, thus InterruA Ing the regular alternation of polarity. Wide do-
card 2/3

ACCESSION MR.- AP4023405
main walls were observed in which a fine structure could be perceived. Such complex
walls oxhibitedialternations of polarity, as though they were composed of several
walls having opposite polarities. It is suggested "Aat the double domain structure
of ferrites may be due to the Interaction between the two magnetic sublattLess,
ach striving to establish Its own domain pattern. Orig.art.hass 5 figures.
Institut fiziki Sibirskogo otdolonlya Akadomii nauk SSSR (Institute of
Physics, Siberian Division). Academy of Sciences, SSSR)
SUBMITTED: 00 DATE ACQ: IOApr64 ZXCL: 00
,SUB CODE: PH NR REF SOV: 014 UnWR: 010
Curd 3/tf

ACCESSION NR: AP4023407 S/0048/64/028/003/0559/0567
,AUTHOR- Kirenskly, L.V.; Savchenko, U.K.,- Degtyarev, I.F. ; Kan, S-V.; Antipin, I.Po,
:Tropin, Yu.D.; Edellman, I*$#
;TITLE:' Domain structure of forromagnatic crystals# films, and whiskers, and chanP
lot the structure undar the Influence of difforant factors ffieporto symposium on
';Porromagnotism and ForroelectrIcity hold in Leningrad 30 Uay to 5 June 19037
S
OURCE: AN SSSR. Izvestlya. Bariya lizichoskaya, v.28, no.3; 1964, 559-567
jTOPIC TAGS: crystal domain structure, film domain structure, whisker domain struc-,
Ituro, domain structure variation, demagnetization condition domain influence, Iron
1crystal domains, Iron film asymmetric hysteresis, Iron whisker domain
ABSTRACT: This paper 8 rizes a large amount oi information concerning the do-
Imain structure of crystals, films, and whiskers, and its change under the influence
iot magnetizing fiolds, stress# temperature, and conditions of demagnetization. The
topics discussed include the changes in thsdossin structure of silicon Iron crys-
tals during magnetization in various directions; the offset of mechanical stress on
ithe domain structure of silicon Iron crystals; the influence of mechanical stress

F

:ACCESSION NR: AP4023407,
on the domain structure in 'the (110) and (211) faces of nickel crystals; the effect
of demagnetization rato.on domain size in thin cobalt.films; the effect of tempera-
ture on the variation of domain structure under the influence of magnetizing fields
in thin cobalt films; the variations of domain structure in thin iron films during
traversal of an asymmetric hysteresis loop in a transverse field; and the'domain
..structure on the (001) surface of iron whiskers (100 to 200 micron diameter) grown
.1in the [1103 direction. The report is illustrated with 47 reproductions of domain
;structure photographs. Among the different kinds of behavior of domain structure
i
;mentioned or discussed are the following. When iron crystals are magnetized In the
;easy direction, the process of domain wall motion stops short of saturation, and the
.'Iremaining narrow unfavored domains disappear suddenly. When the magnatizidg field
a sufficiently great angle with the preferred magnetization direction; initial
...'magnetization taken place by domain wall shift; this in followed by a restructuring
of the domains, after which further wall shifting occurs. The final approach to a&-
ituration is by ordinary rotationo The herring bone or fir tree domain structure cal
.;the (110) face of nickel crystals gives way under the influence of mechanical stress
!to a simple structure. At greater stresses the domains disappear entirely. At stills
I - i
'greater stresses a simple domain structure reappearsp but the domains a" now relat.
card'. 2/3

!ACCESSION NR: AP4023407
ed to the other magnetization axis. The not result in thus a 1090 rotation of the
1domains. The size of the domains in cobalt films increases with the rate of de-
magnetization by alternating field. This in related to the formation of wedge
shaped domains, one within another. When a thin cobalt film Is cooled from above
i
Ithe Curia-point in a field free environment, an equilibrium domain structure in not
I'lormed. The domain structure of a thin iron film was found to change largely by
Iwall shift during traversal of an asymmetric hysteresis loop in the presence of a
.constant transverse field. This is not in accord with the explanation of these as
Imotric hysteresis loops given by V.V.Kobelev (petlL gistorszlsa odnoosny*kh ferro-
Imagnitny*kh planok. ITM I VT AN dSSR,M.,1961) an the basis of a model in which the
,magnetization was assumed-to rotate uniformly. Orig.art.hast 9 figures.
ASSOCIATIONt Institut flziki Sibirskogo otdeleniya Akadeall,nauk 888R(Institute
of Physics,, Siberian Divisionp Academy of Sciences j, SSSR)j Irrasnoyarsk1y pedagoom
lgichaskiy institut.(Krasnoyarsk Pedagogical Institute).
SUBMITTED: 00 DATE ACQ: lOApr64 ENCLt '00
~SUB CODE: PH NR RV SOV: 003 .0nMRt 003
3/3
Card
717

magiietic In ferr:maKnetics ad
ft.rrit-j Tomperaturnyi !rajiitryI gifilvercizI3 farrc,.-
.1 ferritov. 1],-.v os I bl rAk R. j! j j;A del
S,1bji.1k4.',ro oti-iiiPi AN 1 13 t 11)

KIJ~Z;-'~KIY, L.V.; XUi,?FETSfY,T, V.Yc.; IJUATOV, V.U.
MagnatostrictIon of' iron In field vitrIable... Fl-'. : - ',,. -, i~-.,Jtaljoved.
20 no.2:221-225 Ag 165. Off"tA 19:9)
1. Irwtitut, fizIkI. Sibir-Acgo otd-IcIlcrilya AN

10

GORYUNOVA., N.A.1 KIRENSKIYp L.V.) KLASSE)i-NEKLYUDOVA, MOV.
Colloqui= on solid mtats physics hold in Rumania. Vast. AN SSSR
35 no.402 Ap 165# OCRA 18 16)

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A I
-ACC NRs AP5027839 SOURCE CODE: UR100207601165100110081100641
AUTHOR: KirensLdZ, L. V. (Corr 68~6idift member AN SSSR1 Chistyakov. M.S.
'ORG: Physics Institute of the Siberian Department of the AcadeMX of ScIences,88811,
Krasn6 jari%k (Institut f1zHa Sibirskogo otdeletliya Akademil nauk BWR)
TITLV:,, Some possible practical uiii:of ferromagnstio films at ultrahigh frequencies
7.
SOURCE: AN SSSR. Doklady, V. 166s~ noi'l,.- 1966, 81-84
TOPIC TAGS; ferromagnetic film,mw 0hin film,thin film circuit, UHF oscillator
APSTRACT: The use of ferrite elements In URF devices to often Inconvenient because of their
considerable size, large control power requirementg and slow response, resulting in Inceeased,
6ors '6v
Interest in the possible -utilization of ferromagaitic film. The authors In Upted the
eti ff da
properties 9. 000 MC) of thin ferromagnetio films in weak magnetic ff at a large
distance from the ferromagnetto resoi=4086-"~,The~ 17Fe80Ni3M* ermallo Ilms with unlaxial
e!r m
jo
j
magnetic anisotropy were, produced by #&*am evaporation at IvEr mm Hg on a glass support
,heatedup to 200C. , The tests Included: a ,hidies'of 1)'tl?e Influence of weak perpendicular', nmignet-
to fields on the variations In.UHF ad seep' tibility during remagnetization of the film at a certain
angle to the~easy magnetization axis (Fjg, 1).and.2) the shift in eigenfrequency of resonators an
a function of the thic)mess of singe md multilayer films (Fig. 2). The films were s6parated
by Insulating silicon monoxide layers. ,,Results.show that the UHF multilayer film systeras In
weak magnetic fields are superlor-to single-!layer film Units in that the multlpWer as
tome ve a greater effect on the UHF fields. It Is oted that after the development of ~ftn -
card 221,.621,37/32

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coercive force of the films in the multilayer system. This is explained by local
I magnetic interaction between the magnetic layers. The decrease in coerciveness
depends on the thickness of the film and is ex lained by a change in the character
p
LCard I / 2

ACC NR,
AP6033897
of local interaction. Measurements were made of the coefficients of transmission.
and reflection as a function of the thickness of single-layered films and the total
thickness of ferromagnetic metal layers in a multilayer system. It was found that
the coefficients 6f transmission of multflayered systems is substantially greater
than that of single-layered film. The characteristics of the transmission of UIIF-
energy through multilayered films are explained with in the framework of ordinary
electrodynamics. [Translation of abstract) ISP)
SUB CODE: 20/ SUBM DATE
C rd 2/2

ACC Wir AP6007356
AUTHOR& Kirenakiyo L. Vol-laotova, To Pot Balanakiyo W, go
ORGI Institute of Phynicei 60 AN SSSR (Institut fisiki 80 AN B8M)j*Xr&snoY&rak
Pedagago Institute (Krasnoyarskiy pediiwtitut)
TITLEs Multilayer thin film fflyn;tema
1b
SOURCE: Fizika metallov i metallovedeniye, Y. 21, no. 2, 1966t 293-295
TOPIC TAGS: ironj nickel, cobalt, ferromagnotio fila$ ferromagnotia materialiquMITZ
ABSTRACT% The interaction between two-~pyer ferromagnetic films separated from each
A thick layer of_qUU
other by a 2000 tASwas studied. The :tudy(oupplememto the
results of L. V, Kironskiy, T. Ps Izotova, and N. M. Salan kiy Isy. AN SSSR, ser.
fiz., 19659 No- 4, 61o). The coercive force in the films and the distribution of
Barkhounen jumps as a function of the field strength were determined. The experi-
mental reRults are presented 9r cally (see Fig. 1). It is concluded that the bond
field strength of the bond ISO,, Fe-Ni depends mainly on the proportion of the high-
coarcivity layer.
M)01_ 539.2A.2i536.22

ACC NRs AP6007356
b
N
flo fm
NO 80 7
Ito
4~H
Fig. 1. Integral curve's the distribu+,ion of Barkhausen Jump$
along the field. a - for film of.LOjSiO2j7e-Nijb for fila of
-a-ILL ( 16% Fo, 84% NO
Orig, art* hasi 4 graphs.
SUB CODES 11/ SM DAM MIG MW9.
09gar65/L 001/, on kjWj
~g~d 212

TJP(o) JD1HW
L 0912 EWT(m)/EWP(t)/ETI
ACC NRi AP.60N61'7- SOME CODE: UN/0126/66/022/003/0380/0391
AWHOR: Ki=kiy L. Pynkko, Y. G.; Sukhanova, R. Y.; SivkoY, N. I.; Pyn4ko-,
jG. P.; B.; Komalov, A. _�.; Kan, S. V ; Byrova. N. I.; Zveg1_ntoe_v..,_r._U.-
!ORG:' Institute of Physics 60 AN SSSR (Institut fiziki SO AN SSSR);' Krasnoyarsk Ped&---
!g0grC_j Institute (Krasn arskiy pedinstitut)
TITLE: Epitaxial filmatof ironklckelllnd cobalticreport presented at the Conference
on Physics of Ferro- and
Antifeirromagnetism, Sverdlovsk, 5-7 July 19653
ISOURCE: Fizika metallov i metallovedeniye. v. 22, no. 3, 1966% 380-3w0
ITOPIC TAGS: magnetic anisotropy, epitaxial growing, hysteresis loop, metal film
1ABSTRACT: The authors study the epitaxial growth of iron, nickel and cobalt filmi
thermally vaporized onto ionic crystals split in air and in a vacuum. It is shown that
when the substrates are heated in a Vacuum of 10-4 MM Hg, the surface state is changed
with a favorable effect on epitaxy. The phase composition of the film may be control-
led by proper selection of the substrate.' The fields of anisotropy of the films are -
measured and the effect which application of a magnetic field during vaporization-has-
on the magnetic anisotropy of the films is studied. The domain structure of the films.
ajfd its dynamics are analyzed and the results are used as a busia'for explaining ~he'
shape of hysteresis loops. The coercive force is measured in films of various thick-
ness. It is shown that the coercive force of the films is always such Iwo than the
field of anisotropy and is approximately inversely proportional to the saturation mag-
netization. Orig. art. has: 13 figures, 1 table, 5 formulas.
SUB CODE: 11, 20/ SUBM DAM 30ju165/ ona n7: oo4/ On REr: oo7
Card 1/1 not MC2 53Q-216,7,_c!rQA.2*b1,

(b)
AM sylu, V5004462 SWRCR CWX:: ~ 1W0048/08/030/001/0034/0036.
3 xlronskly,L.V~; Bukhanovis it Pywkoit GP
PRM. Institute of Physiest Siberian. action of the Academy of Sclences,'SM'_
f iziki Sibirskoo OtdolOnlys, Aks"all. Sauk SSSR)
TITLE: Domain-structune of cobalt, tals Aransactions 0
filss:grown on'X&Cl-crys
g"ond 111-Union symposiuwon the ~b=ysca -of Thin Forromagnetic Films hold at Irkutsk,:
10 July to 15 Julz" RM
SOURCE: AN SSSR, IzvestlyasSerlys fixlch*sksys, v.30, nool# 2966 34-36
TOPIC TAM forromagnotlo flla$ magnetic thin film, cobalt, magnetic domain structural
magnetic anisotropy
q
-4
ABSTRACT: C )~Ailal~oio deposited at 10 -ms Ng on N&C1 crystal elqavagslxurfacoa'~
having temperatures from-room to"FAture to,400960 and their domain structures were
observed by.means of a trousalsoloureloctron microscope, Conditions for obtaining
single-crystal.filas are-reported-in .1 another'communleatlon. Films deposited on sub-
at.-ates at 200C contained ha~Xig'Onal-titublo -and amorphous phases #ad had a domain,"
.and dev opod under the 0 a
structure that wasAnitifilly-spIttled 01 influonc f an to f Aold
Into a structure'of coarse d9mins vith veskly developed substructure. Thonottled
domain structure is ascribed to the presence of nonmagnetic Inclusions, Films de-
posited on substr Iates hosted to 70 to 1500C did not show a mottled domain slalatu .r2,
Card 1/2

ACC Nih AP6004469
ut the substructure was strongly developed, It was poosible-to obtain oriented f It
0
f p-cobalt crystollites on a 200 'subetratelb The domain structure of these films
hawed no substructure, Investigation"Of-the domal t t of the or ented films
n 0
hawed that films of cubic co t Ziu'rr Albles at
balt'dopositod f roa_'molybd
D-4 ON Hg -have positive magnetic anI sotro , wiWan anisotropy constant about,
PY
rder of magnitude less than that ot,irono~ This finding contradicts the results of
.Sato,K.6,Tatht and R,W,,Astrue (J,App~*Fhyseg 340 1062 (1963)). Filas deposited.on
abstrates heated to 3000C and above had a mottled domain structure which Is ascribed
D the presence of nonsagnotio.inclusions*conslstlngp In this case, of voids.
rto host ..4 figures.
M CODES 20 SUBM DATE: -00 ORIG. R": 000 am RXVS 001

k-66. Aflllipct) )W~W Taw n
T. g17 M(a
A%& NKI A SOURCS CODEI UR/0048/66/030/001/0046/0049
AUTHOR, BirogmkIZ, EMI koj V~G. Antigin, 1, P,
Ono: Laotit~i4~!6f.Pb-yslos,-Siberian section of the Academy of Ionces..'sm
(Institut f IzJLkI Sibirskogo otdoloniYa Akadoxii nauk SSSR); Krasnoyarsk stite
Pedagogical institute snoyarskly gasucarstvennyy podagoglobeakly inst1tut)
v4
T nW: f; 4rch films Aransactions of the Second All-ftion.
Symposium on the Physics-of Thin lerrosagnotic Films bold at Irkutsk 10 July to
15 July 2964,7
SOURCE: AN SSSR, Izvestiyikbarlyii.fixicheakayot v,300 no. 1, 1966, 4fi-49
TOPIC TAGS t f orrma *t1z fillat'" *tic thin film, Iron, opitaxtal growthp sodium
gn
chloride, magnetic domain structure
ABSTRACT: The dom.ain structure of i00 to 10,002opItaxial Iron films vacuum deposited,
on NaC1 substratos'was invost1gatod--by electron mic.roscopy and by the powder pattom
technique. The growth and'"crystal"structure:of the-fllas are discussed elsewhere by
VIO.Pyn'ko and R,V,8uJthsn'ov& '(Izvo:-AN SSSR Ber.,41m., 30, 43 (1968)/ see Abstract
AN0044"/). Thd, f Ilms w re noUrred in"water from the NaCl:xubstrate to glass
;for exasin4OQU by the 'powder. pattern technique or to 50 x 50 p grids for examination.
with the electron microscope. The films could be roughly classified Into three typW.
1) fully~oriented films with the '(001) plans in the plans of the fi2o; 2) films with
Card 2/2 T,-

ACC NRI AP6dO4463
crystallitei ''oriented in two..or three -,different ways with the (001) face in the 19111
parallel to-thi.(001) face,of the substrate and the rlOO] axis In the file parallel to
the.[1103 or the (1001 axis IwIthe'substrats, or with the (110) face in tho1llm
parallelt* the (100) face' .AA,Itho, _e4bstrat.84nd the (200] axis in the film parallel to
the [100] axis'in the substra 'tov' snC3) 'films c9at.aining a large -number of randomly
oriented crystallites* It was-, very,_:,dlff Icult :to obtain a checkerboard domain structu
in type- 1) films; under the inlluenc*o.,o~f an so field there usually appeared large
rectangles or squares of dlffeii,mt iftes.' A regular checkerboard structure was ob-.
tained in type 2) and 3) films, but' the "squaits" were rectangular# Theme c'heekorboArt
structures developed In two stogie the dommin walls parpondtcular to the -&a f i4ld
forming first$ TY Ipe 2) films stilt Ully had'.a fine domain structure with .1W. aid ma'di-j
fled 900 walls; type 2) films regularly had an -j initial mottled domain structure;.the
initial domain structure of was like that of typo 1> or type 2):942mm'?
depending on the substrate toupoiature and deposition rate, After demagnetizatlon the
domains of type 3) f ilms I always showed substructure and those of i.T" 1) 1 Iles did * not.
The ls6O domairi walls were, continuous 'except tho~!s In type 3) fIlUS ContalaingLallarg ,0
number of randouly,orientedierystikllitaii. It In concluded that substructure In @pit-
axial films Is associated with anisotropy dispersion, and that 1809 dozalnewalls:ln",~:-''
spitaxial iroji,films always have j an internal struoturs which, however, any not appear
in tbe,elec&ron microscope imageo"'lit was not possible to observe the domain structure
of the 600 A Muse Orig. art, hast 4 figures*
SUB CODEs 20' 6UDU DAM 00 ORIO, RZF3 002 am 1UWt 006 F~

SOMM -AN SSSR, IxV.4sti ieskyi~flzl h*xkays,'-"v.3-0, no. 1, 1966, 50-53 and 1..n'sr t
a
(f acing pace 45)
TOPIC TAGS: f orroutgnetle film;': iFA00tic Ahin film', permalloy, Iron-nickel illoy'#~-,
Bi4le Crystal, mag"tio coercive force, magnetic domain' structure
ABST&ACT., B.Ingle-crystal. -alloys XS.t* 95% RI) were obtained by
vacuum evaporation "at '10-3 `to: ju ma NX onto the heated (250 to 4000 Auif ac& of., so
XaCl crystal, although 6,biveivem, (Proc:.' Phyi. Soc. 78j 33 .(1961)) and A
Ballbs M:,~
AppleVhys.0 32i.815.'(1962)) found that high4aeuum (10~-9 M ffg~ and ewedUng was Asces-0
nary to obtain.sipgle-crystal filaso No -reason for this discrepancy Is suggested,- In*
alloys containing leis th '20% Ni crysita2lizedin a body,-centered little* with
lattice-constant of 2,828 A and~grow with.tho (001) face and (100) axis parallel t*o'-.
the (001) face.ind 020) lixiso'-respictivoly, ofthe NaC2 substrate; the alloys Can-,.
1--Caid 2/2

ACC NR: AP60G4470 SOURCE CODE: UR/0048/66/030/001/0068/0070
AVMOR: Kirenskiy, L.Y.; Chintyukov,N.S.
ORG: Physics Institute,. Slb(!rian ';ectlon, Acade?nv (if
(Inatitut f UAMbirskogo otdolon Ya Akadond I
TITLE: Superhigh frequency properties of multlInver film oystem-i (rransactiong of the
Second All-Union Symposium on the Physics of F(,rrom.1,~ii~tAc 1hin Films.held at Irkutalk,l
10 July to 16 July 1964)
SOURCE: AN SSSR. Izveatlya. Seriya fizichesknytt, v. -10, no. 1, 1966, 68-70
TOPIC TAGS.- forromagnetic film, mnrnetic thin film, iron. nickel, molybdenum, quartz,!
laminated material, auperhigh f requency, magnetization,
A CT: The interaction of multilayer ferromagnetic film ystems with microwave
frequency fields lifts been investigated in order to determine whether the
limitation imposed by the skin effect on the use of conducting ferromngnotic materials
in microwave frequency applications can be obviated by depositing the material in
layers that are thinner than thu skin depth and are insulated f rom each other. Ilie
films were vacuum evaporated (10-5 mm fig) in n 100-oe magnetic f told onto 9--mm diameter-
circular or 203 x 10 Mictangular glass plates heated to '00C. -1 The metal (ISFe-79-
1; mm 0--e00O-A quart Z f I
i73W)Ijilms were 1000 ~ thick an;V were separated by 150
tal film and its covering quartg~,~--film worn deposited without breaking the vacuum.
The vacuum was then broken ind the crucibles recharged for deposition of the
Cmd 1/2

.1-L - 3961 -1- 1 ~ - I _... --t
ACC NRI AP6004470 ~d
metal and quartz layers. Systems containfn~~ up to ten metal 10yo-si v#_,re 111vostip';tted.
'rho absorption of 3.2 cm micrfjwevos by tho film systems was Inve;jt1gated. The films
were mounted so an to cover the entire area of a waveguide but wLth no olectrical
connection between the metal films and the wavegulde wall, and the attenuation In
the wavegulde was measured. The attenuation wan practically the anme for a ten-layer
film system as for a single film. The magnetization switching of the film system In
a weak sinusoidal microwave frequency field was Investigated by the technIgue describuf
at the present oymposium by N.S.Chistyakov and V.A.Ignatchouko (Xzv . AN 555R, Sor.fiz..,
30, 61 (1966)). The sipnal obtained by t h I's t(Ollif (lilt', W11 I ell
depends on the reaction exerted by the forromagnetle film oystem on the superhigh
frequency magnetic field in a resonator, increased rapidly with %ncreasing numbor or
layers. The observed behavior in ascribed to breakup of the eddy currents by the in
sulating quartz films, and it Is concluded that further study will reveal posalbilit;Q1
for the practical application of wultIlayer ferromagnattc thin f~.Im systems. Or1K.
art. hag: I figure. (151
BUD CODE: 20/ BUBM DATE, none/ ORIG. REF: 001/
ATD PRESS:qj o I
Crd 2/2//,41~'

f5
-J-
0 WIT M
am-WMPF man it ZIP
-A
004
APO 4- If,
YX
i AUTHOR: Ki
renskly, 16,V,; PYS
ORO: Institute of Phyaics. Siberion"Ooction of -thCAgadea of Sclencej,'
(Instifut flzlki Sibirsko
go otdolonlys Akademil n&uk'988R);-Xr&snoysrsk Stite Pods
gogical Institute (Xr&snoysrskiY,gqs4aikitv'en M- pidagoglicheakiy institut)
Domain slai )iickel
TITLE. structure andivtitchi4 of oinzle:g films (Transactions
of the -Second All-Union 'Symposium on the n
-Maics of 7hi jerroxagnatib Films hold -at,
Irkutsk 10 July to 15 July,:19(J7
SOURCE: AN SSSR,.Izvostiya, Sar1ya'fiz1chesksya,:v# 300 not lp l960, 91-92
TOPIC TAGS: ferromagnetic film, magnetic thin filu,nickel, magnetization, single
crystal, magnstic,domain at ial growin
ructuro,.Opitsx _g, sodium chloride
4q,
ABSTRACT: Nicka uii4 ifro,a, 2: 0`0- W4200, thick-wore deposited on MCI substrates
at1200
C, the kinimmun tem Ieirature for epitaxy, and their domain structures and dynamics
i~ere investigated. -~.The (001) planes and.1100) axon of the'alpitax1al f Ilms !#Jl&*.
parallel to the (061) planes I and. DLOO] : axe* t vespoctively, of the imbstra, dip The
easy axis in the 'line of the film fiai' in: or 010" to the [1101 direction, - 2pitaxial
nickel fil I
as depositk on X&M,st,-bighav temperatures usually Awye a flne,~Mttlod
domain structure,and'switch,by nonuniform rotation$ The domain structurorbf the
cold films and their switching behavior voiried'with;the thickness, The domino of
1/2
Caid

ACC. NRi-AP6004477
the films thicker:than 500A'sihibited substructure and the walls evinced I
Intprilial structures. _Domaln formatlon~look p2spe,over the full area of the f Ila -'and
switching was accomplished-by domalh, diest Iruef"n- without significant wall .mov ~t~
10i I .:J
Thiess films were characterisea bfibelined hysteresis loops..,This behav Sas-,
cribed to-inclination,of the easy lanq~of the-filso owing t the abs'snew,
exis.,to the
in that-:plane"of a [Iii] 'axis. ..-...Tfie `Oaisy~ &Zia- of: a film from .300 to 500 fthick -2.8*, In
the plane.of the f Ila In the (110) '.,direction# These f Ilan were rather, uniform: aM
ampl$tude disperolon,oUthe salsotropy:.W48 not detected. The dow'Ains, wers.1a
rge, mint
domain *611 -::Wve=At Iapleyed a,:,s*Ihiaa'nt-rol9 In the "Itching process I Switching . of
'flim's -less, than 300A thick, began,with'Aho. a iarancia of substructure owing to-the
pp
nonuniform, rotation- of the sagneuxation. The bi*avlor of these.f Ilms.1s aserIbied' to
":d t 'jioiuiltorm thickness of'th' f Ils*
amplitude dispersion-of the.anleietrapy us: 0 0
'"has'.":" 4 f Igures.,
art.
BUS CODEt ~20 SM DAT11i v:*:,_00 ONG. RWS 000 On RWt NO
_152/2
Cord
7

ACC
APGO SOU1108 COM IIR/0048/66/030/001/0093/0094
AVrHOR:. Klren~ilj,L.V.; D~nlkojvx.~' Y
ORGI I!gtitut Sib SSSR
e of. _qrl#A Section of the Academy of Sciences,
(Institut fiziki-Sibirskogo otdolenlys. Akademli SSSR)
TITLE: Concerning the coercive ~fores of films wiLh blaxial magnetic anisotropy
,&ransactions of t" second All-UnM ByarxM on the Phg1cs of Thin Ferromagnetl
r' ~'k 10 19!V
Films held,at I ku a July-to r6 UILY,
SOUnCB: AN S8SR. Isvestlys.lerlys fixicheakays', v.30, no. 1, 1966, 03-94# and insert
facing pi. 94 and 95-
TOPIC TAGS: ferromagnetic film-1 magnetic thin.111a, magnetic domain structure,
magnetic aninotropyl magnetic coercive force,
0
ABSTRACT: The coercive forces*''in'directions forming.angles of 0, 25, and 45 with on
easy axis of a film with strongbiaxial~:Magn~tic anixotropy,are calculated-onthe basil
a' Model according to -whiew switobing takes ~plsoe, by processes of f ornatLon and dim-
pla'Ceiment Of, 00 ;domain. watl1a.-: -,The model adopted for switching at 230 to an"eany axis,
involves Isucce'snive.formation andAloplacement of two sets of 900 walls and leads to
two va2ueo*of the coercive force. -The presence of two values of the coercive force is
revealed by steps In the hysteresis loops of evilaxial 1x2n film helpalculated
Card 2/2