Magnetization reversal by a field pulse

被引：3

作者：

Klik, I ^{[1
]}

Yao, YD ^{[1
]}

机构：

[1] Acad Sinica, Inst Phys, Taipei 115, Taiwan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 282卷

关键词：

superparamagnetism; thermal relaxation; magnetization reversal; backscattering; hysteresis;

D O I：

10.1016/j.jmmm.2004.04.031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The stochastic dynamics of a thermally relaxing uniaxial superparamagnetic particle are studied here by means of numerical simulations. First we discuss backscattering effects in zero field relaxation, and the non-monotonic dependence of coercivity on the dissipation strength eta. We then proceed to analyze magnetization reversal by a field pulse of a given amplitude and duration. Reversals by long-duration pulses are governed by the eta-dependence of the relaxation rate, while reversals by brief, large amplitude field pulses are dominated by backscattering effects. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：131 / 134

页数：4

共 6 条

[1] THERMAL FLUCTUATIONS OF A SINGLE-DOMAIN PARTICLE [J].