Effective anisotropy and coercivity in nanocrystalline single-phase NdFeB permanent magnetic material

被引：0
|
作者：
韩广兵
高汝伟
冯维存
刘汉强
王标
张鹏
陈伟
李卫
郭永权
机构：
[1] Central Iron and Steel Research Institute,Beijing 100081,China
[2] School of Physics and Microelectronics,Shandong University,Jinan 250100,China
来源：
Science China(Physics,Mechanics & Astronomy) | 2003年 / 04期
基金：
中国国家自然科学基金;
关键词：
nanocrystalline single-phase permanent magnetic material; exchange-coupling interaction; effective anisotropy; coercivity;
D O I：
暂无
中图分类号：
O482.54 [磁性材料];
学科分类号：
0805 ;
摘要：
The effect of exchange-coupling interaction on the effective anisotropy and its varyingtendency in nanocrystalline single-phase NdFeB permanent magnetic material have been investi-gated.The results show that the exchange-coupling interaction between grains makes the effec-tive anisotropy of material,K,decrease with the reduction of grain size.The variation of Ke,isbasically the same as that of coercivity.The decrease in effective anisotropy is the main reason ofthe reduction of coercivity for nanocrystalline single-phase NdFeB permanent magnetic material.Inorder to get high anisotropy and coercivity in nanocrystalline single-phase NdFeB permanent ma-terial,the grain size should be larger than 35 nm.
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收藏
页码：398 / 404
页数：7
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