Coercivity enhancement in exchange biased systems driven by interfacial magnetic frustration

被引：263

作者：

Leighton, C ^{[1
]}

Nogués, J ^{[1
]}

Jönsson-Åkerman, BJ ^{[1
]}

Schuller, IK ^{[1
]}

机构：

[1] Univ Calif San Diego, Phys Dept 0319, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.84.3466

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the temperature and cooling field dependence of the coercivity of exchange biased MnF2/Fe bilayers. When the antiferromagnetic surface is in a stare of maximum magnetic frustration and the net exchange bias is zero, pre observe a strong enhancement of the coercivity, which is proportional to the exchange coupling between the layers. Hence, the coercivity can be tuned in a reproducible and repeatable fashion in the same sample. We propose that a frustrated interface provides local energy minima which effectively pin the propagating domain walls in the ferromagnet, leading to an enhanced coercivity.

引用

页码：3466 / 3469

页数：4

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