SOVIET PAPERS ON MAGNETISM AND CRYSTALLOGRAPHY

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80T00246A014400130001-7
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 21
• Document Creation Date: December 22, 2016
• Document Release Date: March 7, 2011
• Sequence Number: 1
• Publication Date: November 3, 1961
• Content Type: REPORT

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INVLSTIG; TICN;' OF SOVIET P iYS'I:;S ON THE
THEORY OF FERRO- ANi) ANTIFERR.^CSAGN:3TISDG FOR
L.i3T LEARS .
S.V.VG 9ovsr: ,
Institute of Physics of Metals,
Academy of Sciences of the USSR,
Sverd' ovs)', U ~:. .
During the time since the laot International Conferen
ce on Magnetism (Grenoblr,I958)the research work on the
theory of f and antiferromagneti" rn i'iac been conducted
in the USSR' following lines:
ierro- and lli;.M ism using quantum-statistic
methods (Green* the spectrum of elementary
exitations has be* 4 tl *ined,as well as their lifetime
in a wide temperature r3 the temperature march of
magnetization has been calculated - for lower tempera-
tures it coincides with the predictions of the spin-
wave approximations,for higher temperatures (near and
above Curie point) with those of the molecular field
method (Bogolubov and Tiablikovl ). Ginzburg and Fain`)
have suggested a different self-consistent generalizatio
of the spin-wave method and obtained analogous results.
The spin-wave model has been generalized for the case of
ceveral electrons near the lattice point3); the quantum
theory of ferrites4) and thermodynamic theory of ferro-
magnetic transformation'? have been further developed.
2. The work continued on developing quantum theory
of ferro- and antiferromagnetic metals within the
frame work of (s-d)-exchange scheme using the method of
:reen-functions6i.A spectrum of pin-r.?ave? in Fermi
liquid-is obtained7). The question is investigated
connected with the recombination process of current
carriers of semiconductors with the energy transfer to
I. D~ e general quantum theory of
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''erromagnons8) and the energy spectrum of carrent rurriers
is calculated for case of intrinsic and impurity conduc-
tion of ionic antiferremagnetics9). Study was made of the
interrelation between E;uperconductivity and ferro- and
antiferromagnetism and of influence of 'xchange interac -
tton on the parameters of a superconductorlC).A method is
rut forward for determining the Fermi-surface shift of
conduction electrons of ferromagnetic with different spin
projections II).
3. A theoretical study of the phenomena of atomic
magnetic order, in crystals has resulted in the prediction
and discovery of piezomagnetism find magnetoelectric
effect 12)
4. The work has been continued along the lines of
developing phenomenological treatment of the properties
of crystals with atomic magnetic order using the
crystal-chemical and magnetic symmetry preperties13'I4 ).
5. Properties of weak ferromagneties at low tempera-
tures were investigated15) and the criterion of existence
of weak ferromiagnetlem formulated16).The peculerities of
T7)
this phenomenon in rhombic cry3ta19 were investigated' .
A transformation from the antiferromagnetic state into a
weak ferromagnetic one was discovered experimentally and
explained theoretically18'. For the first time the exis-
tence of two branches of the spectrum of spin waves in
antiferr.magnetics was established from the meaeurements
of heat capaci.tie919).Conditions of magnetic resonance in
various weak ferromagnetics were investigated 20
6. On the basis of the phenomenological theory of
spin-waves there have been investigated energy cpectrum
of ferromagnons,high frequency properties and resonance
in ferromagnetics,eurface impedance,magnete-clastic
,ferroaco,.r.tic resonance,thz!rmal properties of
vraver
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ferre- and antiferromagnetics,preceaces of interaction of
3rin-w3ves with each other and with phonons,relaxation
processes of magnetization in forredielectrics,die ersior.
of magnetic cucceptibility and heat coductivity 14,
mhermodynamic theory of magnetic elastic media has been
further developed 21)
7. Solutions of Landau-Lifshitz equation have been
investigated for an arbitrary value of the alternating
field amplitude 22) ; the influence of the conditions of
electronic resonance on the Faraday and Kerr effects was
investigated 23); methods of Green-functions and Kube-
Tomita were, used for elucidating frequency dependence of
tie susceptibility of ferromagnetics 24).Theeretical
investigations were carried out of resonance line width
in ferromagnetic metals 25),of the resonance frequency
spectrum 2b) and of the role of the dipole-dipole
coupling in the ferromagnetic resonance 27).
8. Temperature dependence was calculated for elec-
tric resistance of ferromagnetice induced by scattering
of conduction electrons with the arbitrary isotropic low
of dispersion by ferromagnons; heat resistance was also
calculated for the case of quadratic dispersion law 28).
1 general phenomenological theory of electric conductivity
of ferrites and antiferromagnetics has been developed
elucidating the nature of "anomalies" near the Niel -
points 29). Theoretical prediction was made for the
additional electric resistance due to the scattering of
conduction electrons by Spin-waves of a ferromagnetic in
the conditions of a ferromagnetic resonance 30).
9. Cross-sections of neutron scatering in ferromagne-
tics due the absorption and emission of ferromagnons have
been calculated 31); scattering of polarized neutrons has
been investigated for different processes and a method is
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indicated for separating cross-sections of these procee-
ses32). With the help of Green-functions the question was
investigated related to the. width of intensity peaks of
neutrons scattered in a given direction and induced by
absorption or emission of a ferronagnon depending on the
neutron energy; the width of the peak was determined by
the damping of spin-wave exitations due to various types
of interactions in ferromagnetic 33).A phenomenological
theory of critical scattering of neutrons near the Curie
and Niel points is set up.3A .Cross-sections of.elastic
scattering-of neutrons in ferriteo depending on the degree
of reversion and composition ar-_ calculated 35).Croes-
sections of elastic and anelastic scattering of neutrons
in antiferremagnetics and ferri_ces are calculated by the
method of spin-waves 36).
10. Temperature dependence of free energy of magnetic
anisotropy and magnetestriction in ferromagnetics in the
low temperature range is calculated on the basis of
phenomenological theory of spin-waves.The nature of the
temperature march of the addition to the magnetic
anisotropy constant induced by magnetostriction is elucida
ted 37).
II. A neutronographic investigation is carried out of
the eiagoetic atesio structure of a number of weakly
ferromagnetic crystals 38).
I.N.N.Begolubov,S.V.Tiablikov,Doklady Akad.Nauk.USSR(D
AN).I26,53 (1959);S.V.Tiablikov,Ukrain.Fie.Jurnal,II,287
(1959).
2.V.L.Ginzburg,V.M.Fain,J.Exp.Theor.Phys.12,1323
(1960).
3.Yu.A.Izyumov,J.Exp.Theor.Phys.~2,IO58 (1957);
Fiz.Yetal.i 1Ietalloved.Z,495;8,3 (1959).
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4."..A.Guaev,Krietallegraf.4,695 (1959);5.,420(1960).
S.V.L.Ginzburg,Yiz.Tverd.Tela,2,203I (1960);
4.L.Ginzburg,..P.Levaniuk,J.Exp.Theer.Phyo*,&9192 61060);
V.V.Zaitsev,Fiz.k tali Metalleved..L,284 (1959);J. xp?
Theor.Phy3. ,1302 (1958).
6.S.V.Vensovski,Yu.A.Izyumev,Fiz.M5tal.i Metalleved.
10,321 (I960);N.A.Petapkev,S.V.Tiablikov,Fiz.Tverd.Tela,
2.2733 (1960);S.V.VonsovsKi,L.J.Kobelev,Fiz.letal.i
Metalloved.11,B20 (1961).
'(.A.A.Abrikosev,I.E.Dzialeshinsky,J.Exp.Theer.Phys.
35.771 (1958).
8.V.L.Bench-Bruevicl,Fiz.Tverd.Tela,I,I86 (1959).
9.M.Sh.Giterman,Yu.P.Irchin,Fiz.Tverd.Tela,2,I44
(1960).
IO.S.V.Vensovski,M.S.Sviraki,Deklady Aked.Nauk SS3R,
122,204 (I958);J.Exp.Theer.Phys.jj,1494 (I959);22,384
(1960);40,N'6,(I96I);B.V,Karpenk*,Piz.Uetal.i Yetalleved.
2,794 (1960).
II.S.V.Vensevski,M.S.Svireki,N.V.Velkenstein,Pis.
Metal, i l;etallevedo j,290 (1961).
12.I.E.Dzialoshinsky,J.Exp.Theer.Phys.22,807 (1957);
E,881 (1959);A.S.Berevik-Romanov,J.Exp.Theor.Phys.26,
1954 (1959);18,I088 (1960);D.N.Astrov,J.Exp.Theor.Phys.
38,984 (1960).
13.S.V.Vonsevski,E.A.Turev,J.Appl.Phya. 2,9S (1959).
I4.A.I.Akhiezer,V.G.Baryakhtar.M.I.Kaganev,Usp.Fiz.
Nauk,7I,533 (I960);72,3 (1960),detailed references.
15.E.A?Turev,Z.Bxp.Th*or.Phys.36,I254 (1959).
16.E.A.Turev,Comptes Rendus, ,342O(I96I).
17.E.A.Turov,V.E.Naish,Fiz.Metal.i Metalleved.2.,IO
(1960);11,161 (1961).
IB.A.S.Berevik-Romanev,N.M.Kreines,J.Exp.Theer.Phys.
11,1053 (1958);N.M.Kreines,J.Exp.Theer.Phys.40,762
(I96I).
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I9.I.R.Kslinkina,A.S?Beiievik-Romsnev,Thises of.Cenferen
ce on Forre- and Antiferremgnetism,Leningrad,Nay,I961,P.B
20.E.A.Turev,I.Guseinev,J.Exp.Theor.Phys.38,I326(I960).
2I.K.B.V1asev,Fiz,Meta1.i Metalleved.1,447-(I959);J.Exp
Theer.Phy?Q8,889 (1960).
22.G.V.Skretsky,Yu.I.Aliaev,J.Exp.Theer.Phys.22,I48I
(1958);,1267 (1959)?
23.G.V.Skrotsky,T.G.Izyumeva,Fiz.Tverd.Tela,2,I7392458
(1960).
24.A.I.Akhiezer,Y.(3.Baryakhtar,3.V.Peletainsky,J.Exp.
Theor.PhYe.4?0_,365 (I96I);Yu?A.Izyumov.Fiz,Veta1,i Metalle-
Yed.12,NII (1961).
25.B.A?Turov,perrwagnetie Resenance,Fizastgis,(I96I);
V.G.Baryakhtar,M.I.Kaganev,Fiz.Metsl.i Metalleved.6,939
(1958). 662 (1960).
26.Yu.A.Izyuaev,Fiz.Meta1.i Metalleved.2,
27.Tu?A.Izyuaev,Fiz.Meta1.i Metalleved.8,807 (1959).
28.Sh.Sh.Abelsky.B.A?Turov,Fiz.Metal.i Metalleved.".
801 (1960).
29. E.A.Turev,Yu.P.Irehin,Piz.Yetal.i Metalleved.~,
488 (1960).
30.E.A.Turev,izveet.Akad.Usuk SSSR,Ser.Fiz.19,474
(1955);P,S.Zirianov,T.G.Ityu a0v&,G.Y,Skretsky,Pis.Xotal.
i Metalleved.8,80I (1959).
IOIO (1957); +
3I.S.V,Maloev,J.UV.Thoor.Ph,Ye.}3.
1518 (1958).
32.S.V.Maleev,J.F.xp.Theer.Phys.4Q?I245 (1961);
Theor.Phya.AI, (1961).
Yu.A.Izywaev,3.Q.Ma1eev, J.Exp
33.Y.N.Kszeheev,M.A.Kriveglaz,Fiz.Tverd.Tela,),I54I
1 Metalleved.I2,I4(196I).
(I96I);Yu.A.Izyumev,Fiz.Metal.
34,M.A.Kriveg1az,Dek1ady Akad.Nauk SSSR,II8,5I
61958)? (1961).
35.Yu.A.Izyumov,A.1~.Men,Kristallogref.6,
36.Y.G.Baryakhtar.S.Q.Maleev,J,Bxp.Theer.Phys.)l,
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1430 (1960).
3?.E.A.Tur?v,A.I.ditsek,J.Exp.Tneor.rhye.37,1127
(1959); 38,1847 (1960).
38.R.A.Alichanev,J.Exp.Theer.Ph,vs.~6,I690 (1959);
)7,II45 (1959).
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44.The Electrical Properties of Thin Films of Nickel
at Very Low Temperat~ires
By E.I.Kondorsky, O.S.Galkina, .A.Chernikova, Chsihn Kai-da
Moscow State University
Thin nickel films were obtained by thermic. evaporation
iR glass tanks brought to a pre psure of 20 7mm. During the
process of depositing the instriment was submerged into r
helium bath allowing to obtain ferromagnetic films of very
high purity.
Electrical properties of thel films were studied nc ucd=Lng
the electrical resistance temperature dependence from