SCIENTIFIC ABSTRACT BOKOV, V. A. - BOKOV, V. A.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000206030003-7
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 45
• Document Creation Date: November 2, 2016
• Document Release Date: June 9, 2000
• Sequence Number: 3
• Publication Date: December 31, 1967
• Content Type: SCIENCEAB

86427
S/la"/60/002/011/011/042
,94/, 7 i?d 3S1 B006~BO56
AUTHORS: Bokov, V. A. and Myllnikova, I. Ye.
TITLE: Ferroelectric Properties of Single Crystals of New
Compounds
With Perovskite Structure
PERIODICAL: Fizika tverdogo tela, 1960, Vol. 2, No. 11, pp.
2728-2732
TEXT: The essential results of this work were communicated at
the Third
Conference on Ferroelectricity (moscow, January 1960). The
authors grew
perovskite-type single crystals of PbNi 1/3 Ta 2/303(1), PbYgl
/3 Ta 2/303
PbCo 1/3'2/3'3 (111), PbCo 1/3 Ta 2/303(IV), and PbZn
1/3n2/1303 (V) and
studied the ferroelectric properties of these compounds. First,
the crystals
were subjected to an X-ray examination vililch showed that all
of them had
perovskite structure with cubic elementary cells. Further, the
following
was found:

8642)
Ferroelectric Properties of Single Crystals
of New Compounds With Perovskite Structure
COMDound
1
2
3
4
5
6
1
4.01
10-17
9-94
395.4
386.0
2.3
ji
4.02
9.80
9.65
383-9
378-0
1.6
111
4-04
8-48
8-45
336.8
335-8
0-3
IV
4.01
10-18
9-87
395.4
383-3
3-1
V
4.04
-
-

-
-
S/181/60/002/011/011/042
B006/BO56
1) Cell parameter, kX
2) X-ray density
3) Pycnometrically de
termined density
4*) Theoretical molecular
weight
5) Experimental molecu-
lar weight
6) Theoretical-experi-
mental deviation, C/':'
All X-ray diagrams exhibited a fine structure. Fig. 1 shows the
temperature
dependence of E and tan 6 of the compounds II, III, I, and IV,
and Fig. 2
that.of V. In all cases E and tan 6 have a maxim~jm. As compared
to the
maximum of E , that of tan 6 is always shifted toward lower
temperatures,
which is characteristic of ferroelectrics.. A study of the
dependence of
polarization on the direction of the electric field showed that
all crystals
have a dielectric hysteresis. Compound V has a particularly
marked loop
with good saturation, and nearly the same good reault. was
obtained for
Il. Fig. 3 shows pictures of the loops. The authors thank
Professor

F,,:~roblectric ProDeriies of Single Crystals
of 2',*ew Compounds-~iith Perovskite Structure
86427
S/181/60/002/011/011/042
Boo6fn,%
G. A.~ Snolenskiy for'his interest and. discussions, anul 7"Irfenova
for ciarryinC out the chemical analyses. A. i. Agranovskaya is r-entioned.
There'are 3 fi-gures, 2 tables, and 4 Sov-,et references;
'iSSOCIATION: Institut poluprovo~nikov IJUN SSSR Leningrad
(Institute of Semiconducto'ro of the A'S USSR, Leningrad)
S UBM THED June 1, 1960
TIbLe
0, ~c a, -C
Legend to Table 2 9
ternper~

-

PbMg,
03
Pb,

ISOOD

12
ature at F, with f=1 4-nc;
ma x
,
,.
PbMjr,j.Tajp,
7000
~8
86 69 - difference of these
03', . . . . .
PbCo.1,Nb,/
6'000
70
teinperature~s of the niobateo
.

70 and of the
Ebrresponding
Pb.Co,/.Ta%O.,
4000
-140
4
antaiate
.
PbN11/pb11.03

4000

-120
~
s.
PbN1, Ta%
03 . ... . .
2400
-180
60
P b Z n.*,,N b,,P.,
22000
-f-140

CaA '3F4----

7000

86427

S/181/60/002/011/011/042

B006/3056

0 U

ZOOO

WOO

Z

005

-160 -Igo

_60

Legen~ to Fig.

1: 1) E(t 2~ tan 6 -
f(j-~
of II, f I kc/sec

3) E(t 4 an 6 =
f(t
of III, f =1

t
5~ FE
l

of 1 f = 450 kc/sec

6 F_ t
~

of IV, f - kc Isec
Card 4/4

BOKOV. V.A.
VACUUM table for optical observattons at low
temperatures, Prib.
., takh.ekep. no.4:143-i45 ji-Ag 16o. (MIRA 13.9)
1. Institut poluprovodnikov AN SSSR.
(Vacuum apparatus)

s/196/62/000/006/004/018
E194/E154
AUTHORS: Myllnikova, I.Ye., and Bokov, V.A.
TITLE: The growth of single crystals of Pb 3NiNb 209and
Pb3MgNb 209 and their electrical properties
PERIODICAL: Referativnyy zhurnal, Elektrotekhnika i energetika,
no.6, 1962, 6, abstract 6 B29. (In the Symposium
'Rost kristallovI (Growth of crystals), T.Z.,
I.I.oscow, AN SSSR, 1961, 438-446. Discussion, 501-502).
TEXT: The growth of single crystals of Pb3NiNb2O9 and
Pb31NJgNb2Oq by the method of crystallization from solution
confirmed the possibility of producing a single crystal of such
complex composition. Growth conditions of both kinds of crystal
were investigated and crystallization conditions favourable to
the growth of crystals of isometric form were selected. The
electrical properties of the single crystals are in good
agreement with the results obtained for I-,olycrystalline
specimens
of these compounds. Investigations of the electrical properties
Card 1/2

The growth of single crystals ... s/lq6/62/ooo/oo6/oo4/ol8
E194/E154
of single crystals of Pb 3NiNb2O9 confirmed the data of
Smolensky and others concerning relaxation and ferroelectric
effects in this compound. Investigations with both hinds of
monocrystals show that these compounds have no definite point
of ferroelectric phase transition. It is supposed that in the
region of temperature where the permittivity is maximum the
possibility of relaxation of domain boundaries is not excluded.
4 literature references.
,T,'Abstractor's note: Complete translation.)
Card 2/2

30546
1 q, 2?oig (to y3, llvr
I I pf .3) S/564J61/003/000/022/029
1-5, .21150 D207/D304
AUTHORSt Mylinikovap 1. 7e.9 and Bokov, V. A.
TITLE: Preparation and electrical properMes of Pb3NiNb2O 9
and PbMOb,O,) monocrystals
SOURCE: Akademiya nauk SSSR. Institut kristallografii. Rost
kristallovp v, 3, 1961V 438-446
TEXT: The authors report on the preparation of Pb3NiNb20, (1)
and
Pb3 MgNb209 (11) monocrystals and.measurements of their
dielectric pro-
perties. Polyerystals of these compounds were first prepared
by a group
working under G. A. Smolenskiy (Ref. 1: G. A. Smolenskiy and
A. 1.
Agranovskaya, Zhur. tekh. fiz., 28, no. 7, 1401p 1958; Ref. 2:
G. A.
Smolenskiy, A. I. Agranovskayat S. N. Popov, Fizika tverdogo
tela, 1,
no. 1, 1679 1059) at the Laboratorya ferritov i
segnetoelektrikov Instituts
poluproyodnikov (Laboratory for Ferrites and Ferroclectrics of
the
Card 1/2

30546
S/564/61/003/000/022/029
Preparation and electrical..o D207/W04
Institute for Semiconductors). The two compounds have a
perovskite
structure; they exhibit both ferroelectric and relaxation
polarization*
in (I) the relaxation polarization in more marked and the
reverse is
true of (II). The temperature and frequency dependences of
permittivity
( E ) and of tg & of Pb~ iiNb209 showeds (1) a maximum of E
( E -
4000) at about -1250C and 450 kc/a j (2) the relaxation type
of polari-
zation and some domain reorientation in strong electric
fields. Similar
measurements on Pb 3MgNb209 showedi (1) an E - 14700 maximum
at.
0 -/a ; (2~ clear rectangular hysteresis loops, especi-
about -15 C and I ke
ally at low temperatures; (3) gradual transition to
ferroelectric state
at low temperatures. Dielectric properties of both compounds
in mono-
crystalline form were very similar to those found in
polycrystals.
Acknowledgment is made to G. A. Smolenskiy, who directed
this work.
There are 9 figures and 4 Soviet-bloc-referenceso
Card 2/2

20793
8/181 /61/003/003/019/030
% '1300 (Ildlr~ B1 02/B205
AUTHORS: ~okov, V. A,--and Mylinikova, I. Ye.
TITLE: Electrical and optical properties of single crystals of
ferro-
electrics with blurred phase transition
PERIODICAL: Fizika tverdogo tela, v- 3, no- 3, 1961, 841-655
TEXT: When investigating ferroelectrics of the perovskite
typeg G. A.
Smolenskiy, V. L. Ioupovq and A. I. Agranovakaya have found
that also other
complicated compounds have ferroelectrio properties. Of these,
the compounds
PbMg 113 Nb 2/303(1) and PbNi 113 Nb2/3'3 (II) and their
mutual alloys have been
studied jacist thoroughly. The two compounds show a relaxative
shift of the
maxima of the temperature functions of F, and tan 6, which is
quite unusual
in the case of compounds with ferroelectric properties. I
shows no
hysteresis loop near the point of saturation, not even in very
strong fields,
which is also an unusual observation. The authors have now
studied the
electrical and optical properties of single crystals of
compounds I and II,
and give a detailed report on their results. The single
crystals were ob-
Card 1/8

20793
S/181/61/003/003/019/030
Electrical and ... B102/B205
tained by crystallization from a solution at decreasing temperature
20-40 deg/hr). The crystals were subjected to chemical and X-ray
analyses
using CoKa radiation in the latter). They were found to possess a
Perovs
~
kite-type structure with the lattice constants a - 4.03 A (II) and
a 6 4.04 A (I). The pycnometrically determined densities were 6,55
g/cm3
(II) and 8.12 g/cO (1), and were somewhat smaller than the values
obtained
by X-ray analysis. The authors examined specimens (0-5 mm)3 large
and foils
of -0.1 mm thickness. 6 and tan 6 as a function of temperature at
E - 15 kv/cm and different frequencies is shown for I in'Fig. 1 and
for 11
ill Fig. a. The effect of a change of the field strength (E ) was
similar
to that of a change in frequency: An increase of E in theocase of I
and II
led to a decrease of the maxima of & and tan 69 and"in the case of I
also
to a shift of the maxima toward higher temperatures. At low
temperatures,
the single crystals of I showed a nearly rectangular, dielectric
hysteresis
loop which was quickly narrowed down with a rise in temperature. At
-300C
it was so narrow that it was no longer possible to determine the
coercive
force. Whereas the coercive force decreased quickly with rising
tempera-
ture, and vanished before reaching the zero point, the spontaneous
polariza-
Card 2/8

20793
Electrical and ...
S/181/61/003/003/019/030
B102/B205
tion likewise decreased with rising temperature; at +800C.
however, it had
not yet vanished. The reversal of polarity of a single
crystal of I was
studiedf and the result isschematically represented in Pig,
6. The tempera-
ture dependence of the intensity of birefringence of a
polarized single
crystal of I was also studied. The results are shown in Fig.
7: curve I
was plotted on heating, and curves 2 and 3 on cooling
(without a field).
The maximum value of An at -1900C (5-10-3) is still smaller
by one order 0f
magnitude than that of BaTiO 3' All specimens of I and II
maintained their
optical isotropy up to -19000. Application of a field
resulted in birefrin-
gence, the relation An - aE2 being well satisfied at room
temperature.
The following results have been obtained from a very detailed
discussion:
I and II are ferroelectrics the phase transition of which
covers a wide
range of temperature. This is due to variations in
concentration which
are again due to the fact that the sublattice contains no
ions which are
orientated in octahedral arrangement. The phase transition to
the ferro-
electric state takes place by spontaneous polarization in the
individual
microdomains of the crystal. This leads to the formation of
very fine
domains which form larger domains only under the action of an
electric field.
Card 3/8

20793
a
8/181 61/003/003/019/030
Electrical and ... B102/B205
In the case of II, this process is not completed at ordinary
usual field
strengths and is unstable. The relaxative properties of the
compounds in
question are due to relaxation of the domain boundaries; this
is analogous
to that occurring in several ferroelectric solid solutions.
Professor
G. A. Smolenskiy is thanked for discussions and his interest in
the Woex,
and N. N.. Parfenova for chemical analyses. I. G. Izmailzade is
mentioned.
The main results of the present work were communicated at the
third
Conference on Ferroelectrioityl Moscow, January 1960. There are
12 figureg
and 16 referances: 15 Soviet-bloo and 1 non-Soviet-bloo.
ASSOCIATION: Institut poluprovodnikov AN SSSR Leningrad
(Institute of
Semiconductors, AS USSR, Leningrad)
SUBMITTED: July 25, 1960
Legend to Fig. 1: 1) 100 cps, 2) 1 kc, 3) 10 kc, 4) 60 kc, 5)
6oO kc,
6) 1 Mc~
Card 4/8

Electrical and
Pig. I
12
f0
8
Card 5/8
r- V ( YI
S/181/61/003/003/010//030
B102/B205
-40 -20 0 JO $0 60 80 WO
-140 -160 -/40 -MV

20793
3/181/61/003/003/019/030
B1021B205

Fig. 7
20793
S/ii3l/61/003/003/019/030
B102/B205
5. 0
set
3, 0.-
2-
-zoo -180 -160 -140 -/zo -too *0
Card 7/8

Electrical and ...
Legend to.Fig. 8:
1 100 cps, 2) 1 kat'
3 10 kc, 4) 60 kc, 40
5~ 600 kc. V
jx
~0793
S/18IJ61/003/003/019/030
B102/B205
-40 -M 0 20
/so :-ffo -f4o -flo -fm -80
Card 8/8
61.04.

S/056/62/042/002/054/055
B108/B138
AUTHORS: Bokov,,_~V.A-~Myllnikova, I. Ye., Smolenskiy, G.
A.
TITLE: Ferroelectric antiferromagnetice
PERIODICAL: Zhurnal eksperimentallnoy i teoreticheskoy
fiziki? v1. 42,
no. 2, 1962, 643-646
TEXT: The authors proved the assumeA, existence of
perovBkite-type ferro-
electric antiferromagnetics at the compounds Pb(Fe 2/3W1/3
)03and
Pb(Fe 1/2 Nb 1/2)03 (the ions in parentheses are located
at the octahedral
sites). The electric properties were measured at single
crystals and the
magnetic properties at finely ground crystal powder.
Results for the
first compound are shown in the Fig. The second compound
has similar
properties. The temperatures of ferroelectric phase
conversion are 1780K
for PbFe 2/3WJ/3'3 and 3870K for PbFe 1/2 Nb 1/2 03
(maximum of 0. The phase
conversion temperatures from paramagnetic into
antiferromagnetic state are
3630K for PbFe 2/3W1/303 and 1430K for PbFel /2 Nb 1/203'
However, all these
Card I

S/056/62/042/002/054/055
Ferroelectric antiferromagnetics B108/B138
phase conversions are rather washed out so that the given
temperatures
are only approximate. The Ne"el temperature of these compounds
is much
lower than in orthoferrites since the former contain a
considerable number
of unmagnetic ions at the octahedral sites. The experimental and
calculated Neel temperatu7 a of PbFe, (363 and 4060K.~
respectively)
1/3'1/3'3
are in good agreement. For PbFe 1/2 Nb 1/203these values (143
and 2760K,
respectively) differ considerably owing to the segregation of
ions of one
kind in the sublattice in the case of high "dilution" of the
solid solu-
tion. The relatively small effective magnetic moment of the Fe+
Ions in
PbPe 2/3W1/303 (Peff w 4.2 ABYP calculated 5.92 VB ) is due to
the inexact
extrapolation of the linear part of the 1/4(T) curve. For PbFe
1/2 Nb 1/2 039
lieff - 5-4 gB , A residual magntitic moment could not 'be
observed owing to
the high coercive force. There are 1 figure, I table, and 5
references:
2 Soviet and 3 non-Soviet. The two references to
English-language
publications read as follows: J. Tsubokawa, J. Phys. Soc.
Japan, 15,
2243, 1960; M. A. Gillo, J. Phya. Chem. Solids, 13, 33~ 1960~
Card 2/~

B/056/62/042/002/054/055
Ferroelectric antiferromagnetics BlOS/B138
ASSOCIATION: Institut poluprovodnikov Akademii nauk SSSR
(Institute of
Semiconductors of the Academy of Sciences US-~'R)
SUBMITTED: December 17, 1961
Legend to the Fig.: temperature dependences of (1) A, (2)
1/4, W6,
(4) tan 6
Card 3/f, '3

BOXOV, V. A.; S~MENSKIY 0. A.
.9
"On the coeyistence of izgnetic and electric ordering
in crystals."
Report presented at the 9th Annual Conference on
Magnetism and
Magnetic Materials, Atlantic City, 'New Jersey, 12-15
Nov 63-
Institute of Semiconductors, Academy of Sciences of
USSR, Leningrad

.ACCESSION la: AP4028463 S/r'181/64/006/004/1240AW
.AUTHORS.- Tutov,, A. G.; Vorvllnikova, I. Yo.; Parfonova, N.
N,; Bo%ovo Vo A91
Nizhalev., so A*
TITLE: New compounds in the systoms B (Fa3+j A13+, Ga3+,,
j-jn3+)
'203-M0203
.;SOURCE; Fizika t-,rfjrdogo tela, v. 6, no. h, 1964p 1240-1242
~TWIC TAGS: Bi2o.-Fe2C3, Bi203-Al2 03, Bi203-Ga 20V
B1203-Nn293oxthorhombic
.crystal, unit call, call parameter,, magnetization,
paramagnotie,, antiferromagnetio
ABSTRACT: The authors have undertaken a studyof compounds
coifoining Bi wl:,,h
203
the sesquio-.ddes of Pa., Al, Ga, and Zrx because of the lack
of data on these
substances* Among iron compounds they obtained Bi2O3*2Fe2O,.
In the Al and G&
compounds they synthesized an isomorphous series. Chemical
analyses were not made
(because of small quantitien produced) but similar formilas
wore assumed (B:L203.
2A120 and Bi 0 *20&20 ). For 'Ain, results indicate a
composition of Bi2O o2Fe 0-
3 2 3 3 3 2 '3.4
The specific gravity ef the latter nrystal (by picaometer is
7,33, of tha Fe
CIM4 1/2,

ACGMION NR: AP4028463
mineral 6.81, Single cry-stals were obtained of all these
compounds. Ceramic
samples were also obtained of the Fe compound. The specific
gravity of these
sa.aples is 6.53. The Al and Ga compounds formed transparent,
rectangular, light
green prisms. The Fe and Mn minerala proved to be orthorhombia,
with cell par&-a-
0 0 0
eters of a - 7.86 AR, b - 8.40 Is o - 6.oo AO and a - 7.47 A, b
- 8.52 A, a . 5.75 A
:respectively. Magnetization of the Fe comipoilnd,, measured in
a field reaching a
rLix-J.-aun, of 8000 oersteds., rises with temperature and
passes through a maxiaiam at
265~C before descending'. No residual magnetization was'
observed. This suggests
.that at 265X the mineral undergoes a transition from the
paramagnetic to the anti-
,ferromagnetic state. "In conclusion,, the authors express their
thanks to Professor
G. A. Smolenskiy for his interest in the work." Orig. art. has;
I figure.
iAS=IATION: Institut poluprovodaikov AN SSSR,, Leningrad
(Institute of Semicon-
ductors AN SSS11)
SMUTTED: 23Nov63 DATE ACQ: 27Apr64 LICL: 00
SUB CODE: FU NO FM SOV% 004 OZMR: 001
2/9

q
ACCESSION NR- AP4030631 8/0048/64/028/004/0614,/0619
AIM1011t Smolonsiciy, G.A.; Dokov , V.A..; Mitook, A. 1.
TITLE, Regarding the existence of magnetic and electric
ordering in crystals 4190-
port, Symposium on rorromagnetism and Forroolectrioity hold in
Loningrad 30 May to
5 June 19627
SOUnCE: AN SSSR. Izv.,Ser.fiz.,v.28, no.4, 1964, 614-619
TOPIC TAGS: farromagnetic ferroolectric materials, perovolsite
stnicture, forromng-
notic ordering, ferrooloctric ordering, DiFeO3, Yh1n03, 'Vb%103
ABSTRACT: The authors point out that there is no basic
principle forbidding the
simultaneous appearance of forroolectric and forromagnetic
ordering in the same
crystnI, and they discuss recont work, both their own and
others', indicating the
existence of such double ordering in some substances. Two of
the authors have given
a thermodynamic discusoion of simultaneously furromagnatic atul
forroolectric mater-
ials (G.A.Smolonskiy, Fizilca tvordogo tola,4,No.5,1095,1962;
A. r.mitack and G.A.Swo-
lenskiy, Ibid. No. 12,3581,1962). These substances aro
characterized by a combined
electromagnetic suscoptibility tonsor relating both the
polarization and the magne-
ICard 1/3

ACCESSION NR: AP4030631
tization to the electric and the magnetic field. Possible
interaction mechanisms, ~)e-
tween polirizatlc~,n and magnetization are-, internetion of
both with the elastic de-
formations of the crystal; the influence of electric charge
distribution on the for-
romagnatic exchange interaction; the influence of electric
charge distribution on
the electron orbits, and therefore on the spin-orbit
couplin.g. Particularly favor-
able for the simultaneous appearance of forromagnotic and
ferroelectric properties
-ire con d
mplex crystals with the perovskite structure containing
transition metals an
ions having an unshared 6s electron pair. Pb(Fe2/3Wl/3)03 and
Pb(Fel/2Mbl/2)03 were
investigated and found to be ferroelectric as well as
antiferromagnetic. Some of the
ferric ions do not participate in the antiferromagnatic
ordering and so behave para-
magnetically, leading to an increase in the susceptibility
with decreasing tempera-
ture even below the Neel point. Calculations al the Neel
point (G.A.Smolenskiy, V.A.
Isupov, N.N.Kraynik and A.I.Aranovskaya,lzv..AN
SSSR,Ser.fix.25,1333,1961), on the
assumption that a ferric ion participates in the
antiferromagnetic ordering only
when it has at least two magnetic nearest neighbors, gave
results in reasonable ag-
reement with experiment for Pb(F02/3Wl/3)03# There have been
indications, particu-
larly from its behavior in certain Polid solutions, that the
antiferromagnetic BI-
FeO3 might be ferroolectric. The low resistivity of this
substance, however, can
Card 2/3

ACCESSION NR; AP4030631
give riso to errors. High frequency electrical measurements on
BiFeO3-1,aFeo3 soi Id
solutions showed that BiFeO3 is not ferroolectric. The
ferroelectric,materials
W1nO3 and YMn03 were found to be antiferromagnotic, wIlth Neel
points below the tem-
perature of liquid nitrogen. Orig.art.has., 40 Xormulas, 3 figures
and I table.
ASSOCIATION: none
SUBMITTED: 00 DATE ACQ: 3OAprO4 ENCL: 00
SUD *CODE: NR RBF BOV: Oll OMIER: 004
C(Ird 3/3

ILIIN, Georgiy Sergeyevich; DOKOV,~ V.A.j, red,
(Cerehic piezoelectric elements] Keramichaskie
plezo-
elementy. Leningradj 1963. 19 p. (Laningradskiy
dor, nauchno-
tekhnichaskoi propagandye Seriia: Elektrichenkie
metody obra-
botki matorialov, no.2) WIRA 17:9)

Pt-:1O/P3-4 IJ.P(c)/ADJTL/SSD/
'AS (MP),2AAER(-c)/_;SI~-gs_)/ASD
ACCESSION NAI A?4046616- S/0181/6410061010130381310144
_~JAUTHORJ Ink'OVI-V. A.i Xithayev, S.~A.; M lnrkova, Ye. Tutov,
!A* G11
T~ 7-_-!
1717LEs Ant i f i7i r-i i7inA
e of -rb- 0
/2 1/2
t
d --- v 6 10,9- 19640 3038-
-ve -r-oito tela 00 --3044-
MIC TAG53~ single cryztal_Hrowtb~ lead cobalt tungstcte vrygtal,
p
crovskite type structure, feyvoclactric crystal, antiforroelectric
~crystal, paramagnetic crystal, phase transition
W 03 a 1_'19le
1ABSTRACT: PbCo crystals wera grown fron oolution in
I ~t 1.& 1 2
imolten PbO, an eir crystal structure, and electric nn,~ ninnotic
!propertias were determined and compariad zo those of Pb"-,
- 1, ~~ k ~.~ -
~vhich. is the only known -stable antifaTroalactfic CL- A- 0
af2
a-In o
of compoun4s. Thia x-ray powder pattairia lindi,intaa D z:r -vzkv~-_
'type Btructura 'with a rhombic tin I tcall at room
i 2? +
lbic call'at SOC,'vitb ordered distribution of CO * and V 10;1~3 Tho
emperature dope ne
t ndanee of tb dialciptric constant of lard aingic cryo
tn1a showed a maximum at 32C: corri'iponding to the tr~-u,,,itloon
fror, the
1 '3

3-
~~A~U?,SSION N;RJ AP4046616
7paraelectric (cubic)' phasa to the antiferroelectric (rhambic) phsse.
~Thi3 naximum shifted toward lower temperatures on application o f an
iinarsasing constant electric field. The observed double hy-ateresis
4oops in the antiferroelactric phase, i4ess at low ta-vnp. Pr at 11
ri-i -3
(below -100C) whinn electric field's arz appalled, wa3 currelated
'with
e I a- rI:ri,t -s tatC The double hyatnresia loop was-gradually
transfor-M-ed
anto a normal loop vhen teTaperatureuas decreased further 'to -193C.
t)The transition point into tho-ferroclactric state in tha absence of
11
Iield wat detarrained to bq -206C. The ".tritlical" field, at wbich
tho
loop di-siappen-rs-i vas -Bhown- to- dectease with decreasing
ysteresis
'temper.aturef, The transition into the farroalectric state fn a
strong
iel'actric field t3 posalble because of a small difference in tbo_
fro-C
~energiaa of both stat~:a. The antiforroulactric state q an b 1
A~ more !,:It C
-.'Ihie A t e-,44evendence. of --the' "ast-
Savers Ut one
,a iTbCo 'could nat te correlated with the'
I3_U__:O_CGPva4nt~ 1/0112_03_
---Er
--f a Ve tvItIt7-i~ta1_thv3jgh-_ A-i-devtation -on- kh---
Pplear-ante--o _1111tiferro t
Icuri-e-Waiss, IAW_ ~vas -in*ta4.below-:-IOOCc-! iThe .-abaenCe of.
ma~netie_phasa
-~;at ilaast In-Ah-a-tampiazrtuTa xange~ .bove 6
I _~~transitionz~ vas i-deducedt, 19 C,*:-
r
j

ACCESSION ~NRj- AP4046616--

.
'AS SOCIATI01
Institut
N:
OlAiprovoduikav r3

.
.
.68mitonductors-, AN SSSRT-:-~-

TD F
SUBMITTED1

,
~T -u --cobur, k0 --Ant. -sov- -069- 0711-pu

- - --- - - - - - -7

Z ~7
T -7 ----77--

:--7 T 77,--j
Li

3/3,
70.

BOKOVI V.A.; ROMANOV, V.P.; Cl!~IJN, V.V.
Mossbauer el"fect on Sn 11,9 nuclei due to the
ferrVelectrin nhase
Lransition in the solid sol.zitJon Ra(Ti ~ , S, n ~
V "'r.
C) . ts cl.2~0-i. F; -. -
tela 7 no.6:1886-1888 Ju 'o5. (YIRA 1s:("))
1. Fiziko-teklinlcheskiy Instituf n-l,-,kild-,
terpera"ur, Kh,,I~-Ikov i
Institut poluprovoirilkov AN iSSR, Lpningrad.

L 646~_66 __ E WT(IVEWP(e "/EPA(s )_2/E;WT(m)!;&WP(i)/EPA(w)
(11-) /VAIPCb _)DI-1_1AP
ACC NRt AP5025259-- ___IJ_f_(0- - JD/WH SOURCE CODE: .
P/0386/65/C>02/004/0186/0189
4'.j "04 q~' N-'; q4;-;~ . j
AUTHOR: Chekin, 'v,. V.; Romanovj_V. P., Verkin, B. I.. Bokov, V.
ORG: Physicotechnical Institute of Low TeTperatures Academy of
Sciences UkrSSR
(Fiziko-te)diniclieskiy institut nizkikh temperature Alta Feml
TITLE: Clhange ir the probability of the Mossbauer effec or. nAs'
impurity nuclei in
the fftrroelectric i)hase transition_in
SOIAE: Zhurnal eksperimental.Inoy I teo"retid'heskoy fiziki.
Pistma v redaktsiyu
(Prilozheniye), v. 2, no. 4, 1965, 186-189
TOPIC TAGS: Mossbauer effect, ferroclectric effecty phase
transition; barium titanate
impurity centcr, :L~n containing al~4,.' 1,
_'Icontinuation of earlier work (FTT v. T, 1886, 1965),
ABSTRACT: This is a where it was
assumed that the phase transition in solid solutions of the
Ba(Tio.8Sn6.2)O3 s-ysterd-is
considerably spread out. In the present study, the authors
have'investigated the pro-
bability of the Mossbauer effect on Snl,3-9 impurity nuclei in
the Ba(Tio.99Sno.oj)O;3
system near the ferroulectric phase-transition temperature. The
introduction of so
small an amount of tin impurity into barium titanate does not
change its ferroelectric
properties noticeaW~r, but at the same time makes it possible to
measure the resonance
absorption of 23.8-kev y quanta by the SnJL19 impurity nuclei.
The samples were pre-
pared by standard ceramic technology, using tin oxide enriched
with Sn'19 to 65.1%.
The measurements were made with a setup In which the absorber was
driven at constant
Card 1/3
17n/

L b4b5-00
ACC NR: AP5025259
Fig. 1. Temperature dependence of the
relative Mossbauer erfect probability
(1), dielectric constant (2), and
dielectric loss tangent for the system
Ba(Ti Sn )0
0.99 0.01 3
L
2k
4
---

L 646 1-66
ACC NR: AP5025259
speed by means of a mechanical cam drive. The y-quantum source was
magnesium stannide
-18 vv,/cm2 thick. Measurements were made of the temperature
dependence of the rela-
tive Mossbauer-effect drobability (1),, of the dielectric conbtant
(2)~ and of the di-
electric loss 11;angent (3) for the system Ba(Tio.99Sno.03.)03
(Fig- 1). The relative
probability of the effect was determified from the ratio of the
areas of the absorption
spectra at the given temperature to the area of the spectrum at the
Curie temperature,
the value of which (TC = 390K) was chosen to correspond to the
maximum of the dielec-
tric constant, It is seen from the figure that the relative
Mossbaver-effect pro-
bability decreases quite sharply on approaching the Curie point
from the paraelectric
region,. passes through a minimum, and then begins to grow with
decrease in temperature
in the usual manner. This singU1440 can be attributed to the
temperature dependence
of the frequency of the anomalous optical branch. A comparison of
the results with
earlier measuremen4ts (Bokov.9 Romanov,, and Chekinj, FTT v. T,
1886, 3065) confirms the
previously advanced )0q)othe sis that the phase transition in solid
solutions of the
Ba(T1 S system is considerably "smeared." Authors thank Professor
G. A.
Smolle1=1 lous interest in the work, Candidate of Technical
Sciences I. E.
ikE
Val I nikov I
,b jieparing the samples, and L. 1. Kazakevich for help with the
measure-
ments. Orig. art,. has: 1 figure. qu, 7 E-
SUB CODE: SSI SUEM DATE: 21JUn,65/ ORIG REP; 0031 OTH REF: 002
Uw

I b,
M06
1 -22
VR;
AUMOR Boko v, V -A ; R1zhayav,S,A.; M yl n Ll m v, a aa t 0 v 0
trot,,m-,,,v_'7 T -A
TE, Antiferroebactric and forroelectric pblase
PbC. o 0 geport, 4th on F-3-roel-tr' c-11~4,--,
hald 11~ yios tov- on -the -f o--.n
SGUME: AN SSOSIR. lzvestiya. Ser.fizicheskaya, 7.29,nno,6,1955,
TOPIC TAG$: ferroelect-ic material, antiferroelpetric Fnt'eriz~_'
ant-i-
ferromagmetic materlZ, perovskite structure, ~ea~_compound, cobalt
cozpound, tungsten compo-~nd, single crystal
ABSTRACT; IMUlle aut 'ors have grown single crystals of P- 1- by
c
1. ing asolution in FbO from 1200 to 800D~ at 'Lae ate r, o
0o r
X-.ray diffraction measuarements with pL-wders of tne sl L n S! e c
T7, s t za"' s
!.gave values of the lattice constants in sagre-ement with thos~~
obtained
ifor polyerratalline material by M.Filiplev and
tallografin 9,9,93,1964). M6 matarial has the pD ~nc?~,

Cit
C&PS70,j
A
and thO s7me"l-jry is Thombobedral at 26oC and cub.-11. c a50-0C. 'Th
ed-j--
electric constant was found to have a maximam at 320C. Tltai-s
e7chibited sli.,ht temperature hysterebi!3 amft vza:a sh:ffted
t-o-~-rL-
bv ~llc f 'I e 1d,
tomperatims app
ation sf an 61ect-ric
t~tnt curre had a Imee at 68 K and the loss t-anporil';
58-K. 'With thin (50 micron) plates, double hyst3resis 1nor's
served belo-w -10000 in fie2ds of the order o 41' 1
sis loops were single at liquid nitrogen temparatui~-s.
ed that the material ruidergoes a p;hase t-n,:,-nqitI,'m
tric to the antife.-roelectric stla~e -fat 32 v ~ I., C,- ~'n tni,
an
elect*ric to -~he ferroelectric state at SSOK. T e
11 a h
~j " v
nary hystaresis 'Loops atbove the f6rrcelectric trans-I ti-xil
Onporature
is discussed# The magnetic susceptibility -was maasur~71i~
ne
from the Curle-Weiss la-q indicate that the mate.-Ia1
romagnet-ic at suff.l.ciently low temperatiir*)s~ Or!.P, -
AS-S, Cr, IA TI, ON -. none
SUB41TTED a 00 IMCL 1 00 S -U BC 0 5, ST I
DR RZF SOV:
005
OTIM: 000

.L 10760--66. IJP(C) . 7Q/JV1/GG & -
ALL NKg APS022747 SOURCE CODE: OP/0101/65/007/009/286;3/2871
AUTHOR: Kizhayev, A.; Tutov, A. G.; Bokov, V. A.
ORG: Institute of Semiconductom AN SSSR, LeninFrad (Tnstitut
polupr-avodnikov AN
SSSR)
T17LE: Structure and magnetic properties of TlMnF3
SOURCE: Fizika tverdogo, tela, v. 7. no. 9, 1965, 286R-2871
TOPIC TAGS: thallium compound, manganese compound, fluorido, x
rav analysis, crystal;
structure, magnetic propiarty
ABSTRACT: Data are given from x-rav and magnetic studies of a
new compound, TIMnF3:
The specimens were produced by mixinR saturated aqueniis
solutions of thallium>~Iluorlde
and manpatese fluoride at 200C. CuK and CrK a were used for the
x-ray studies With
_V
photographic and umization recordinr. It was found that the new
compound has a pe-
rovskite s The lattice has a cubic cell with a parameter a =
4.250 1 0.001
angstroms. The interplanar spacinR and radiatign intensities of
TlMnF3 are tabulatedi
for various Miller indices. The Mq~ of the compound is plotted
as,
a function of temperature from 65 to 5200K. Thie curve shows a
maximum at 850K which
is apparently due to a transition to the antiferrafiagnetic
state. The authors are
Card
-
L
1/2

L 10760-66
ACC NR: AP5022747
grateful to G. A. Smolen_sk for interest in the work, and also
thank V.
~ U -B. Mironov,
A'."'N.-'Lazarev and A.I'S.A~arsu)cov for furnishing the
specimens. Orig. art. has: I
figure, 5 fomulas, 2 tables.
SUB CODE: 20V07/ SUBM DATE: 23Apr65/ ORIG REF: 001/ OTH REr: 005
L Card 2/2

L 15742-66 &JT(m)/k-,W(v)/T/WP(t)/EWP(b) IJP(c) JD
! .1-1 - -1-1 1 1--
!ACC INR; AP6000897 SOURCE CODE:
;AUTIJORS., Bokov.-V4 A.j My Inikova, I.
LB r a M rikbryan, A
_a7-bin
,ORG: Institute of Semiconductors,Aff SM.
!poluprovodnikov AN'~-SS-Rl-
-- - - -1- -1 .-- . - - A
UR/0181/65/007/012/3W,/36981
Ye,; Kizhayev, S. A
Leningrad (Institut
TITLE: Structure and magnetic properties,of BiMn
1'~. 03
SOURCE: Fizika tverdogo tela, v. 7, no. 12, 1965, 3695-3698
TOPIC TAGS: bismuth compound, manganese compound, magnetic
property,
temperature dependence, Curie point, ferromagnetic material, solid
solution, ferroelectricity
ABSTRACT: The authors synthesized the BiMnO In the form of small
-'j 3
whiskers, using a technique described ersew ere (FTT v. 6, 124o,
1964)
and measured its magnetic propertles at temperatures from 55K to
room
temperature at Hmax 9.5 kOe. They found DiMnO 3 to be a
ferromagnefl-,'
I Card 1/12

L 15742-M
WIM NR: AP6000897
1with a Curie point at 110K. The large ferromagnetic moment of
BiMnO
is attributed to positive exchange Interaction in the chains Mn3+
-_
0 -- Mn 3+. The authors also synthesized solid solution s DI 1-X
CaX MnO3
with x = 0.41 0.3, and 0.2, uoing a standard ceramic technique. An
,investigation of the magnetic properties of these solid solutions
at
I temperatures from 77K to room temperature has shown that
increasing
!CaMnO3 concentration the paramagnetic Curie temperature decreases.
IThe solid solution Bi Ca MnO has a maximum magnetic susceptibili~
0.6 o.4 3
at 155K. The drop in the paramagnetic Curie pcint with :increasing
x
Is related to a decrease in the distances between Ions of the man-
ganese in all three directions. The existence of the compound
DiMnO 3
and of solid solutions on its basis offers, in the authors'
opinion,
another possibility of obtaining ferroelectrlc-ferromagnets.
Authors
thank G. A.-Smolenski-v for encouraging this work and for a
discusEiion
of the result5. Orig. art. has., 2 figures
SUB COM., 20, 1V SUM DATM 23ju165/ ORIG REF: 006/ OTH REF: 002
card -2/

L 21219-66 EWT (m)/E VIP (w)ITIE I-jp (t) Jjp (C) JD/JG
ACC NR: AP6003809 SOURCE CODE: UR/Ol8i/66/oo8/ool/O26';/0267
AUTHORS: ___k'jzbayqy S. A.; Bokov V. A. Kachalov, 0. V.
ORG: Institute of Semiconductors AN__SSSR, Leningrad (Institut
1 9
polup dnikov AN SSSR)
TITLE: Magnetic properties,of YMnO
11(6 3
SOURCE: Fizika tverdogo tela, v. 8, no. 1, 1966, 265-267
TOPIC TAGS: ZLLii,_u1e78 ound,, ferromagnetism, magnetic
susceptibil-
ity, single crystal, magnetic moment, temperature dependence,
neutron diffraction, antiferromagnetism 2
ABSTRACT: In view of "the lack of convincing data allowing to
con-
clude the existence of weak ferromagnetism and in YDInO the
authors
measured its magnetic properties using single-crystal Kmples,
at.
low temperatures. The magnetic susceptibility was measured
with a
magnetic balance by the Faraday method in the temperature
interval
from 4.2 to BOOK at a maximum field of 13.6 koe The apparatus
employed was described in detail by N. M. Kreyn~s
(Disser'tation, IFF,
Card 1/2

L 21219-66
ACC NR: Ap6oo38og
M., 1959). The synthesis of the single crystals was described by
the authors earlier (PTT v.-5, 3607, 1963). The specific suscepti-
bility decreased slowly with increasing temperature, and no spon-
taneous magnetic moment was observed at low temperatures. Nor were
anomalies observed, characteristic of antiferromagnetic phase
transitions, on the temperature dependence of the reciprocal mag-
netic susceptibility. Neutron diffraction has disclosed, however,
the presence of antiferromagnetic ordering at 11.2K. Judging from
the values of the lattice parameter, the temperature of the anti-
ferromagnetic ordering should lie in the liquid-nitrogen range. It
is concluded on the basis of the data that YMnO is not a weak
3
ferromagnet, but a compensated antiferromagnet. The authors thank
G. A. Smolenskiyfbr interest,-A. S. BQrpAk-Romanov for the oppor-
tunity of performing the magnetic measurements at lo_w temperaturel
I. Ye. MY11nikova for supplying the single crystal?,'~-and N. M.
Kreynes for reviewing the manuscript and valuable remarks. Orig..
art. has: 2 figure6.
SUB CODE: 20/ SUBM DATE! 30ju165/ ORIG REF: 004/ OTH REF: 007
-Carcl _.2/2.

0
Z 38887-66 E',','P(e)/Ela(m)/E'IP(%v)/T/E'.VP(t)/ETI , IJP(c)
AT/WH//_7D/FW/,TG
ACC NRi Ap6018577 SOURCE CODE: UIV03.81/(>6/008/()06/195T/195~,
AUTHOR: Kizbayevp S. A.; Bokav, V. A.
ORG: Institute of Semiconductors, AN SSSRI Leningrad (Inatitut
polupravodnikov 4'
SSSR) ~- 1~ V1 %11 0 41 11
TITLE: \FAZnctic properties of _(Zpo.rW -nd BaNio.5WO.503
_0. 5039
SOURCE: Fizika tverdogo tela, v. 8, no. 6, 1966, 1957-1959
TOPIC TAGS: lead compound.. barium compound, phase transition..
ferroelectricity,
antiferroelectricityp magnetic moment, magnetic susceptibility,
ferromagnetism, anti-
ferromagnetism~, i7t" "-t_
ABSTRACT'-'- ---This is a continuation of e r er work (Izv. AN
SSSR, ser. fiz. v. 29,
929, 1965) where it was found that PbCoo.sWO.503 (I) has two
phase transition points
connected with electric orderingp becoming antiferroelectric at
305K and ferroelec-
tric at 68K. The present study was made on this sul-stance at
low temperatures and
also on Ballio.SWO.503 (II) at liquid-hydrogen tempe'?atiLres,
since the latter had no
magnetic phase. transitions above room temperatur,,n- The
measurements were made with
apparatus desi:xibed by N. M. Kreynes (Diaaertatv-,, Institute
of ftsics Problems,
Moscow, 1959). In the case or I the wMAetic suh~!%---i
'!~tibility goes through a mmximm
at 9K. At this temperature a spontaneous magnetic moment is
producedp amounting to
0.15 G-cm2/g at 4.2K. In the case of 11, the suscaptibility has
a maximum at 55K and
no spontaneous magnetic moment was observed. It is concluded
from the magnetic mea,-
Card

ACC NRI AI360185TT
surements that II becomes antiferromagnetic at 55K, and I
becomes at 9K antiferro-
magnetic with weak ferromagnetism. The Neel teraperatures of
II and I are 17 and 9K,
respectively. The results show that I below 9K is
simultaneously ferroelectric and
'weakly ferromagnetic. This points to the existence of a new
type of perovskites with
both electric and mapetic ordering simltaneauOy. The authors
thank G. A. Smolen-
skiy for interest in the work and a discussion of the results,
A. S. Bor-a--U&No-manov
and N. M. Kreynes for the opportunity to make the measurements
at low temperatures#
and I. Ye. Yql' for preparing the samples. Orig. art. has: 2
figures and 1
table.
SO CODE: 20/ sm DATz: o4jan66/ oRiG REF: on/ oTH Pjw: oo4
C.,d 212,1-~iL-,,-

~e
6