SCIENTIFIC ABSTRACT IGNATCHENKO, V.A. - IGNATENKO, A.YE.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000518330001-0
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: January 3, 2017
• Document Release Date: July 27, 2000
• Sequence Number: 1
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

4
3/058/61/000/012/064p83
A058/A201
AUTHORS: Rodiobev, A.M., Ignatchenko, V.A., Salanakly, N.M,
-----------------
Tr=: Evaluating the.Barkh~usen Jump
PERIODICAL: Referativnyy zhurnal. Fizika, no. 12, 1961, 385, abstract 12E700 (V
ab. "Magnitn. struktura ferromagnatikovff, Novosibirsk, Sib. otd.
AN SSSR* 1960# 113 - 121)
TEXT: The Barkhausen Jump is regarded as a variable magnetic dipole with
magnetic moment m-m(t). The emf Induced by the dipole field In sIngle-layer and
multilayer measuring coils is determined. It is assumed that field H is parallel
or antiparallel to domain magnetization. 'It is shown that incident to evaluation
of the Barkhausen jump, length 1 of the measuring coil has a great effect on
measurement results; for the error not to exceed 10%, the condition 1 ;00 40D must
be observed (D being the mean diameter of the measuring coil). Maximum accuracy
can be achieved if 1 exceeds specimen length by 2D. It is noted that experimental
setups for measuring the Barkhausen jump that do not contain special integrating
elements or that have a measuring coil for a pickup can only be graduated in
Card 112

Evaluating the Barkhausen jump 8/058/61/000/012/064/083
A058/Aiol
terms Or dm/dt. On the basis of an experiment simulating the Barkhausen jump, it
was found that the formulae Of the present work can be utilized for specimens with
d 4 0.6 mm (d is specimen diameter).
L. Vinokurova
(Abstracter's note: Complete translation]
Card 2/2
s/o58/61/ooo/ol2/066/083
A058/A101
AUTHORS- Ignatchenko, V.A., Rodichav, A.M.
TrUE: Cbncerming the distribution in magnitude of Barkhauzen Jumps
FMODICALt ReferativnYY zhurnal. FIzIka, no. l'92, 1961, 385, abstract 12E702 t%V
ab. "Magnitn. struktura ferromagnetiicV', Novosibirsk, Sib. Otd.
AN SSSRP 1960, 123 - 127)
TEXT: The distribution in magnitude of the Barkhausen Jumps is associated
with how ordered in structure the-specimen is. It is pointed out that experimental
setups having only one measuring coil for a pickup..can only measure one component
of the rate of change dmO/dt of the magnetio moment incident to Jumps, for in-
stance in the case of field H parallel to the Z-axis of the coil dm2/dt. If,how-
ever, the texture degree W is known, then the V. distribution (VO being the volume
remagnetized as a result of Barkhausen Jumps) can be determined on the basis.of
the measured distribution of moz, A caloulation method is provided. In the case V
of a single crystal (the V. distribution being known) the degree of ordering of
domain structure (W) is determined from the measured moz distribution. Calcula-
Card 1/2

Concerning the distribution
8/058/6i/boo/ol2/o66/,o83
A058/A101
tion results were qualitatively borne out by experimental verification on Fe-31
single crystals and polyarystala.
[Abstracter's notes
Complete translation]
L. Vlnokurova
Card 2/2
5/126/6 0/009/03/022/033
E032/E414
V.A. and VansovskiY, S-V'
AUTHORS1 ~1~naatcchh~eannkmOo the Magnetoslast"
the Formula for
TITLE1 on the Form Of
EniLM of a perromagnOtic 2-1 196o, Vol 9, Nr 3,
X/ allovedeniyei
Fizika metallov i met
PERIODICAL$ pp 456-457 (USSR) ula for the density of
ation of their form ; (Ref 1)
ADSTRAvrt -In the deriv energy, Becker and Dorinj repeated in
magnetoelast'c This W&a Let
introduced a Mall inaccur&CY* iv&tion (Ref 2,3). this
subsequent versions Of this der in the derivation Of
some of the steps -I' which dep nds
us reproduce anisotropy energ be writt:n in
formula. The part Of tions may
on the powers of forced deforma ula the
e form given by Eq (1). In this form . is neglected
th pure volume change fo - 0).
dependence 0 f fa On L, uik a-0, j L k, then ti n
(when ull -.u22 I uY.5 the elastic deforma, i
are the components Of f the vector 9
H re Uik Mi are the direction cosines 0 is written
M.Or, elastic moduli and fu r
are the It is well-known (cf fo 1"~
C2 and c3 given by Eq W* the
in the form 2 or 4) that for a free cubic crystalg
card 1/3 example Ref

S/126/60/009/03/022/033
E032/E414
On the Form of the Formula for the Magnetoelastic Energy of a
Ferromagnetic
components of the deformation tensor are related to
the components of the stress tensor by the relation
given in Eq (3). A substitution of Eq (3) into Eq (1)
leads to the expression given by Eq In previous
derivations, the term
1
5 dii
was neglected since it in independent of ai. However,
this approximation robs the formula of any clear physical
meaning. It is therefore suggested that the full Eq (4)
should be used for fa. Let us consider expressions for
fa in certain special cases. If the crystal is
subjected to uniform extension (compression) in the
direction yl;)Y2, Y31 then Oik = OYiYk and fd is
given by Eq ( . If the spontaneous magnetization in
directed alone the "easy" direction (along Clod] for iron
Card 2/3 and along 111 for nickel) then f. is given by theo

S/126/60/009/03/022/033
E032/E414
On the Form of-the Formula for the Magnetoelastic Energy of a
Ferromagnetic
expressions in Eq (6) respectively,
the angle between the direction Of ex where y is
magnetization. tension and the
Finallyp in the isotropic
magnetostriction approximation
for an arbitrary orientation of. 100 0 X111 and
-~B. relative to the
crystallographic axis, F. is gi-?n by Eq (7). There
are 4 references, 2 of which are Soviet, 1 German and
I English.
This is a complete translation.
ASSOCIATIONStInstitut fiziki Sibirskogo otdeleniya AN SSSR
(Institute of Physics of the Siberian Branch AS USSR)
lnstlit-u--t ~fiziki Metallnv AYJ CO-
(Institute of P) USSR)
SUBMITTEDt February 39 196o
Card 3/3
- S/126/60/009/05/019/025
OR324E
na%natchenkOt V-A
Polivanov, K9M*1 Rodichev, A, -Eics on the
AUTHORS: r Ferroma jznel ;P1
TITLE: The Effect of the Parameters 01 ff-ect
Measurements of the Barkhausen E
PERIODICALS. Fizika metallOv I met allovedeniye, 1960, Vol 91 Nr 5,
PP 778 - 789 (USSR) is usuallyttudied by measuring the
ABSTRACT: The Barkhausen effect ng the ferromagnetlc
emf induced in a coil surroundi
ecimen. The emf Pulses induced in this coil by dis-
sp etization are the only source
continuous changes In the magn
of information about this phenomenon, The time interval
between successive pulses can be made quite large by a
suitable choice of the linear dimensions of the specimen
and the rate of change in the magnetic field H . Under
such conditions each emf pulse corresponds to a single
discontinuity. The present paper is concerned w-ith the
determination of the relation3hip between the pulse
parameters and the volume of the region in the ferro-
magnetic within which the discontinuous change in the
magnetization takes place, the increase in the magnetization,
Card 1/2 the change in the magnetic moment, the duration and the r&t-e
CL~~

S/l26/6O/oo9/o5/ol9/O25
The Effect of the Parameters of FerromaEgRON164n the Measurements
of the Barkhausen Effect
ASSOCIATION: Institut fiziki
USSR)
SUBMITTED: December 15, 1959
Card 2/2
AUTHORS:
TITLE:
PERIODICAL:
AN SSSR (Institute of Physics of the
/126/60/009/o6/OJ5/025
EOJ3~E335
RodicheV2 A~M, and IgtAatchenkot
Dynamics of the Barkhausen vedeniye, 1960, Vol 9, Nr 6,
Fizik& Metallov i metallO
pp 903 - .908 (USSR)
r of the movement
The authors investigated the characte The
ABSTRACT: ary during a Barkhausen jump.
omata bound ollowing m8chani*ml
of the d attribted to the f H
Barkhausen Jump is ase of the magnetic field
in the case of a slow incre s in such a way that
the boundary between domains displace of the Sum A all
at each instant of time the conditions ed. If
magnetic energies having a minimum are fulfill
the boundary hits a bqrriers it may impede its movement'
lution is obtained df the equation of
In this paper a 10 een written taking into consideration
motion which has b cting on the boundary and formulae are
the basic forces a nce of the duration
derived which establish the depende aracter"tics of-the
and speed of the Process on various ch .
In another paper (Ref 8Y, the authors
forromagneti0e ributiOil Of
rep rt on the measurement of the dist
0 ion of pulse durations in IAB
Cardy./2 Barkhausen JU16PS , a funct
of the process, etc. it is shown that the only physiral
characteristic which can be'found directly from the
observed induced emf is the change in the dipole moment
In 0 Which is proportional to the tine integral of thic
induced emf- It follows that it is desirable to include
an electronic integrator in the usual apparatus employed
to measure the Barkhausen effect. A formula is obtained
(Eq 21) which expresses the emf induced in the measuring
coil as a function of the change in the magnetic dipole
moment of a region in a ferromagnetic cylinder at an
arbitrary distance from its axis. The formula is similar
to that obtained by Tabble et al (Ref 3) but its derivation
is more rigorous. The theoretical calculations are compared
With published experimental results* There are 12 figures
and 11 references, 8 of which are Soviet, I German and
2 English,'

S/126/6o/oog/o6/015/025
Dynamics of the Barkhausen Jump E073/E335
nickel specimens for pulses of durations between 2 and
30 jLs. The analysis of the results of this experiment
published in earlier work (Ref 2) leads to the conclusion
that the real durations of the jumps did not exceed I Its.
Evaluation by means of Eq (14) of this paper for an
.equal specimen yiblds time values which are not contra-
dictory to these conclusions.
There are 3 figmres and 8 references, 3 of which are
English, 2 French, 1 German and 2 Soviet.
ASSOCIATION: Institut fiziki
thf-ke --SC 0 USSR)
SUBMITTED: December 15, 1959
AN SSSR (Institute of Physics of
V/8
Card 2/2

W98
S/056/60/039/005/015/051
B029/BO79
141 Sbo
AUTHORS: Kirenskiy, L. V., Ignatchenko, V. A.t Rodichem, A. M1.
TITLE: The Behavior of a Domain Structure Under the Influence of
Elastic Tensions
PERIODICAL: Zhurnal eksperimentallnoy i tooretichoskoy fiziki, 1960,
Vol. 39, No. 501), pp. 1263-126a
TEXT: Using a thermodynamic method devised by L. D. Landau and Ye. M.
Lifshits the authors studied an iron-type #iyatallite whose surface '
coincided with the (001) plane. They ass-- .the existence of partially
overlapping domains whose width can assume values between 0 and D
(D denotes the width of the principal domains). In this paper, the free
energy of such a structure is calculated. The coordinates are assumed to
coincide with the tetragonal axes of the cry3tallite, and the dimensions
of the orystallite along the coordinates &.re denoted by xdyo,zo. 'Using
the method of Ch. Kittel.(Ref. 2) for the calculation of the energy of the i'
C~
cos (2in - 1) ak
magnet. poles, one obtains WD
Irr, Its 1,05+ (2m - 1)3
Car d - 1 /5

86898
The Behavior of e Domain Structure Under the S/05 60/039/005/015/051
Influence of Elastic Tensions B029YB079
where W denotes the surface density of the magnet poles. Moreover,
k - d/D. f(k), that is, the expansion appearing in the brackets of (1,I)
was calculated by means of the tables compiled-by K. A. Kitover (Ref. 11).
Por estimatbs, f(k) - 5.280- 6.84k2 + 2.1 for k,