Annealing effect on exchange bias in Ni81Fe19/Cr50Mn50bilayers

被引：13

作者：

Xi, H. ^{[1
]}

Bian, B. ^{[1
]}

Zhuang, Z. ^{[1
]}

Laughlin, D.E. ^{[1
]}

White, R.M. ^{[1
]}

机构：

[1] Data Storage Systems Center (DSSC), Department of Electrical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States

来源：

IEEE Transactions on Magnetics | 2000年 / 36卷 / 5 I期

基金：

美国国家科学基金会;

关键词：

Annealing - Antiferroelectric materials - Coercive force - Diffusion - Grain size and shape - Magnetoresistance - Surface roughness;

D O I：

10.1109/20.908546

中图分类号：

学科分类号：

摘要：

The effect of annealing on the exchange bias in Ni81 Fe19/Cr50Mn50 bilayers was investigated. A large increase of the exchange field and coercivity was observed in the samples annealed at temperatures higher than 310°C. The annealing causes the Mn atoms in the Cr50Mn50 layer to diffuse into the Ni81 Fe19 layer and form an antiferromagnetic NiFeMn phase, which coats on the Ni81 Fe19 grain surface and contributes to the improvement of exchange bias. An increase of interface roughness due to the Mn diffusion also results in the exchange bias enhancement. The enhanced exchange field and coercivity were explained by the reversible and irreversible motions of NiFeMn moments of the inhomogeneous grains.

引用

页码：2644 / 2646