An experimental investigation of magnetization reversal in advanced metal particles

被引：2
|
作者：
Bottoni, G [1 ]
Candolfo, D [1 ]
Cecchetti, A [1 ]
机构：
[1] Univ Ferrara, Dipartimento Fis, INFM, I-44100 Ferrara, Italy
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2000年 / 36卷 / 05期
关键词：
advanced metal particles; magnetization reversal; rotational hysteresis;
D O I：
10.1109/20.908457
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 basic processes of magnetization in metal particles for advanced recording technology, with high coercivity and saturation magnetization, are experimentally investigated. The study is carried out through the experimental analysis of the rotational hysteresis, the measurement of angular dependence of the coercive field, the evaluation of the magnetic anisotropy and of its distribution and the determination of the thermal activation volume, as deduced from the variation of the magnetization with time, in correlation with the results of the particle structure analysis. The analysis indicates that the magnetization reversal of the whole particle is incoherent, or not cooperative, but that coherent rotation can take place in the crystallites composing the particle itself.
引用
收藏
页码：2432 / 2434
页数：3
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