Room temperature magnetic hardening in mechanically milled ferromagnetic-antiferromagnetic composites

被引：32

作者：

Sort, J ^{[1
]}

Nogués, J ^{[1
]}

Amils, X ^{[1
]}

Suriñnach, S ^{[1
]}

Muñnoz, JS ^{[1
]}

Baró, MD ^{[1
]}

机构：

[1] Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Barcelona, Spain

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2000年 / 219卷 / 01期

关键词：

coercivity; energy product; exchange bias; ferromagnetic-antiferromagnetic; ball milling;

D O I：

10.1016/S0304-8853(00)00422-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Enhancements in coercivity, squareness and energy product have been obtained at room-temperature by mechanically milling mixtures of ferromagnetic (FM) (Co) and antiferromagnetic (AFM) (NiO) powders. All these effects decrease with increasing temperatures, up to T = 600 K, just above the Neel temperature of the antiferromagnet. Due to the competition between coercivity enhancement and reduction of saturation magnetization in AFM/FM mixtures, although the maximum coercivity enhancement has been found for (AFM)1:1(FM) weight ratio, the maximum energy product is obtained for composites with larger FM content, i.e. (AFM)2:3(FM). (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：53 / 57

页数：5

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