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
收藏
页码：131 / 134
页数：4
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