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Computational Modelling of Ring-Shaped Magnetic Domains

Published online by Cambridge University Press:  10 February 2011

A.F. Gal'tsev ,
V.G. Pokazan'ev  and
Y.I. Yalishev
A.F. Gal'tsev
Affiliation:
Ural State Academy of Railway Transport, Ekaterinburg, 620034, Russia, afg@nis.usart.ru
V.G. Pokazan'ev
Affiliation:
Ural State Academy of Railway Transport, Ekaterinburg, 620034, Russia
Y.I. Yalishev
Affiliation:
Ural State Academy of Railway Transport, Ekaterinburg, 620034, Russia
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Abstract

A theoretical research of static stability of peculiar localized domain structures (LDS) in a thin magnetic film with the perpendicular anisotropy is presented. The model describes a system consisting of cylindrical magnetic domain (CMD) and several concentric ring-shaped domains. Such structures arise under influence of the external low frequency (100–1000 Hz) magnetic field applied perpendicular to the film plane and were observed experimentally in 1992. Non-linear singular integro-differential equation for a magnetization distribution is provided by a minimization condition for the system's complete energy local density. Energy dependencies on geometry parameters are calculated numerically. The conditions of magnetostatic stabilization of the simplest CMD-ring system, as well as some of its dynamical properties, are discussed in detail on this basis.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 529: Symposia BB – Computational & Mathematical Models of Microstructural Evolution , 1998 , 157
Copyright
Copyright © Materials Research Society 1998

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