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A MAGNETIZATION DISTRIBUTION IN A SINGLE DOMAIN WALL VOLUME

Bogdan. anygin,lexandr V. ychko

National Taras Shevchenko University of Kyiv, RadioPhysics Faculty, prosp. Acad. Glushkova, 2,

building 5, b.m.tanygin@gmail.com

A spatial magnetization distribution in domain wall volume in thin (001)-film with negative cubic

magnetic anisotropy is numerically investigated for various film thicknesses.

1. An information about magnetization vector M spatial distribution in a medium volume is basic at a

theoretical investigation of magnetic states and processes in a magnetically ordered media. Reductive models

that allow getting an analytical description of such distribution are used for receiving this spatial distribution

[1]. Hence these models only can characterize a domain structure and domain walls (DW) approximately,

often qualitatively. One can obtain a detailed information about DW structure using numerical methods. In

particular, an equilibrium DW distribution ofM in thin (001)-film with positive cubic magnetic anisotropy

(MCA) was obtained by means of a method of setting [2]. In this paper the M spatial distribution in

unlimited in a plane thin (001)-film with a negative cubic magnetic anisotropy for various sample thicknessis numerically considered.

2. In infinity crystal or thin (001)-film with negative MCA 710-, 109

0- and 180

0-DW [3] or 90- and 180

0-

DW [4] is possible, respectively. At that easy magnetization directions coincides with crystallographic

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3. The numerical modeling is realized for yttrium ferrite-garnet (001)-film: SM =135 G;

1K =24.8

,10

3erg/cm

3; A=0.41

.10

-6erg/cm. Results of M distribution in the volume of 90- (a-c) and 71-

DW (d) are presented in figure. Results are obtained for film thickness 0h : a 2.46 0 ; b - 6.15 0 ; c -

8.61 0 ; d- infinity crystal, where 0 = 1KA characteristic DW length. In figure 1 , 2 and 3 -

directing cosines in coordinate system with -type axes. Independent variable x (fig.) is a coordinatealong >