A computational model of thermally activated high speed magnetisation reversal in longitudinal thin film media

被引：3

作者：

Hannay, JD ^{[1
]}

Walmsley, NS ^{[1
]}

Chantrell, RW ^{[1
]}

机构：

[1] Univ Wales, Sch Elect Engn & Comp Syst, Computat Magnetism Grp, Bangor LL57 1UT, Gwynedd, Wales

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1999年 / 193卷 / 1-3期

基金：

英国工程与自然科学研究理事会;

关键词：

thin film; intergranular exchange coupling; thermal activation; high speed switching;

D O I：

10.1016/S0304-8853(98)00436-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A computational model of thermally activated magnetisation reversal in longitudinal thin film recording media is described. We introduce thermal effects into the simulation by adding a random field term to the local field of each spin, thus converting the deterministic Landau-Lifshitz-Gilbert equation of motion into the stochastic Langevin equation of the problem. The model includes anisotropic crystalline, magnetostatic (dipole), and exchange interactions. Methods of perturbing and expanding a system of grains which initially form a regular lattice has given a physically realistic system of grains which lie on an isotropic physical structure having a log-normal grain size distribution and also a random distribution of in plane easy axes. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：245 / 248

页数：4

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