Dynamics of thermally activated reversal in nonuniformly magnetized single particles

被引：59
作者：
Boerner, ED
Bertram, HN
机构：
[1] Center for Magnetic Recording Research, University of California, San Diego, San Deigo
来源：
IEEE TRANSACTIONS ON MAGNETICS | 1997年 / 33卷 / 05期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1109/20.617841
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The dynamics of thermally activated reversal in elongated ferromagnetic particles is studied. A micromagnetic model is used which accounts for thermal fluctuations through the addition of a stochastic fluctuation field. Results are given approximating a particle of 5:1 aspect ratio, with exchange length equal to particle radius, which is typical of current particulate media. Past relaxation of the magnetization is observed. Thermal effective volumes inferred from our results can be significantly less than particle volumes.
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页码：3052 / 3054
页数：3
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