Effect of exchange-coupling interaction on the effective anisotropy in nanocrystalline Nd2Fe14B material

被引：24

作者：

Han, GB ^{[1
]}

Gao, RW

Yan, SS

Liu, HQ

Fu, S

Feng, WC

Li, W

Li, XM

机构：

[1] Shandong Univ, Sch Phys & Microelect, Jinan 250100, Peoples R China

[2] Cent Iron & Steel Res Inst, Beijing 100081, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 281卷 / 01期

基金：

中国国家自然科学基金;

关键词：

nanocrystalline Nd2Fe14B; exchange-coupling interaction; effective anisotropy;

D O I：

10.1016/j.jmmm.2004.03.039

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of exchange-coupling interaction on the effective anisotropy in nanocrystalline Nd2Fe14B permanent material has been investigated. The results show that the exchange-coupling interaction between grains causes a decrease of the effective anisotropy constant, K-cff, with decreasing grain size. The variation of K-eff with grain size is basically the same as that of coercivity. The decrease of the effective anisotropy is the main reason for the reduction of the coercivity. In order to get high anisotropy or coercivity in nanocrystalline Nd2Fe14B material, the grain size should be larger than 20 nm. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：6 / 10

页数：5

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