Strong perpendicular exchange bias in sputter-deposited CoPt/CoO multilayers

被引：19
|
作者：
Wang, J. [1 ]
Omi, T. [1 ]
Sannomiya, T. [1 ]
Muraishi, S. [1 ]
Shi, J. [1 ]
Nakamura, Y. [1 ]
机构：
[1] Tokyo Inst Technol, Dept Met & Ceram Sci, Meguro Ku, Tokyo 1528552, Japan
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 04期
基金：
日本科学技术振兴机构;
关键词：
MAGNETIC-ANISOTROPY; FILMS; ALLOY; PD/CO;
D O I：
10.1063/1.4816336
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Strong perpendicular exchange bias was realized in sputter-deposited CoPt/CoO multilayers. The as-deposited multilayer shows strong perpendicular magnetic anisotropy (PMA) which remains up to a critical CoPt layer thickness as thick as 4 nm. After perpendicular field cooling, the multilayer with antiferromagnetic CoO and ferromagnetic CoPt interfaces exhibits large perpendicular exchange bias of 1730 Oe. Strong PMA in the CoPt/CoO multilayer is mainly attributed to the positive magnetoelastic energy due to the remarkable in-plane tensile stress originating from the local epitaxial growth. The mechanism for the exchange bias was explained in terms of the interfacial spin structure. (C) 2013 AIP Publishing LLC.
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页数：4
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