THE ANISOTROPY MEASUREMENT OF THE ULTRAFINE γ-Fe2O3 POWDER

被引：0
|
作者：
罗河烈
孙克
聂向富
机构：
[1] Hebei Normal University
[2] Shijiazhuang 050016
[3] Department of Physics
[4] PRC
[5] Bering 100080
[6] Academia Sinica
[7] Institute of Physics
来源：
Chinese Science Bulletin | 1990年 / 24期
基金：
中国国家自然科学基金;
关键词：
ultrafine powder; anisotropy;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Since Néel proposed that the surface anisotropy exists on magnetic materials, which not only concerns the basic magnetism, but also influences greatly on the performances of the magnetic materials, the anisotropy of ultrafine powder has been investigated by many authors. This note proposes a method by which the anisotropy constant K may be calculated by using the equations for describing the relaxation process of superparamagnetic particles.
引用
收藏
页码：2040 / 2043
页数：4
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