Enhanced uniaxial anisotropy and two-step magnetization process along the hard axis of polycrystalline NiFe/NiO bilayers

被引：22

作者：

Zhao, T ^{[1
]}

Fujiwara, H ^{[1
]}

Zhang, K ^{[1
]}

Hou, C ^{[1
]}

Kai, T ^{[1
]}

机构：

[1] Univ Alabama, Ctr Mat Informat Technol, Tuscaloosa, AL 35487 USA

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.65.014431

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polycrystalline NiFe(10 nm)/NiO(1-8 nm) exchange-coupled bilayers show enhanced uniaxial anisotropy but no unidirectional anisotropy. Meanwhile, a two-step magnetization process was observed along the hard direction, These two phenomena cannot be simultaneously understood using the models for ferromagnetic/antiferromagnetic bilayers, in which a parallel alignment or a random distribution of the ease axes of antiferromagnetic grains is assumed. Therefore, a model, supposing a preferential distribution of the easy axes of antiferromagnetic grains, is proposed for understanding the mechanism of these phenomena.

引用

页码：1 / 7

页数：7

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