Exchange bias in ferromagnet/antiferromagnet bilayers

doi:10.1088/1674-1056/23/2/027503

中国物理B ›› 2014, Vol. 23 ›› Issue (2): 27503-027503.doi: 10.1088/1674-1056/23/2/027503

所属专题： TOPICAL REVIEW — Magnetism, magnetic materials, and interdisciplinary research

• SPECIAL TOPIC --- Non-equilibrium phenomena in soft matters • 上一篇下一篇

Exchange bias in ferromagnet/antiferromagnet bilayers

时钟^a, 杜军^b, 周仕明^a

a Shanghai Key Laboratory of Special Artificial Microstructure Materials & Technology and School of Physics Science and Engineering, Tongji University, Shanghai 200092, China;
b Department of Physics, Nanjing University, Nanjing 210093, China

收稿日期:2013-09-17 修回日期:2013-11-25 出版日期:2013-12-12 发布日期:2013-12-12
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10174014, 60271013, 60490292, 10574026, 50625102, 50871030, 10974032, 51171129, and 51201114) and the National Basic Research Program of China (Grant Nos. 2009CB929201 and 2010CB923401).

Exchange bias in ferromagnet/antiferromagnet bilayers

Shi Zhong (时钟)^a, Du Jun (杜军)^b, Zhou Shi-Ming (周仕明)^a

a Shanghai Key Laboratory of Special Artificial Microstructure Materials & Technology and School of Physics Science and Engineering, Tongji University, Shanghai 200092, China;
b Department of Physics, Nanjing University, Nanjing 210093, China

Received:2013-09-17 Revised:2013-11-25 Online:2013-12-12 Published:2013-12-12
Contact: Zhou Shi-Ming E-mail:shiming@tongji.edu.cn
About author:75.30.Et; 75.30.Gw; 75.60.Jk
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10174014, 60271013, 60490292, 10574026, 50625102, 50871030, 10974032, 51171129, and 51201114) and the National Basic Research Program of China (Grant Nos. 2009CB929201 and 2010CB923401).

摘要/Abstract

摘要： Since the exchange bias (EB) effect was discovered in the Co/CoO core-shell nanoparticles, it has been extensively studied in various ferromagnet (FM)/antiferromagnet (AFM) bilayers due to its crucial role in spintronics devices. In this article, we review the investigation of the EB in our research group. First, we outline basic features of the EB, including the effects of the constituent layer thickness, the microstructure and magnetization of the FM layers, and we also discuss asymmetric magnetization reversal process in wedged-FM/AFM bilayers. Secondly, we discuss the mechanisms of the positive EB and the perpendicular EB. Thirdly, we demonstrate the hysteretic behavior of the angular dependence of the EB and analyze the EB training effect. Finally, we discuss the roles of the rotatable anisotropy in the two phenomena.

关键词: exchange bias, ferromagnet, antiferromagnet, bilayers

Abstract: Since the exchange bias (EB) effect was discovered in the Co/CoO core-shell nanoparticles, it has been extensively studied in various ferromagnet (FM)/antiferromagnet (AFM) bilayers due to its crucial role in spintronics devices. In this article, we review the investigation of the EB in our research group. First, we outline basic features of the EB, including the effects of the constituent layer thickness, the microstructure and magnetization of the FM layers, and we also discuss asymmetric magnetization reversal process in wedged-FM/AFM bilayers. Secondly, we discuss the mechanisms of the positive EB and the perpendicular EB. Thirdly, we demonstrate the hysteretic behavior of the angular dependence of the EB and analyze the EB training effect. Finally, we discuss the roles of the rotatable anisotropy in the two phenomena.

Key words: exchange bias, ferromagnet, antiferromagnet, bilayers

中图分类号: (Exchange and superexchange interactions)

75.30.Et

75.30.Gw (Magnetic anisotropy) 75.60.Jk (Magnetization reversal mechanisms)

时钟, 杜军, 周仕明. Exchange bias in ferromagnet/antiferromagnet bilayers[J]. 中国物理B, 2014, 23(2): 27503-027503.

Shi Zhong (时钟), Du Jun (杜军), Zhou Shi-Ming (周仕明). Exchange bias in ferromagnet/antiferromagnet bilayers[J]. Chin. Phys. B, 2014, 23(2): 27503-027503.

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Exchange bias in ferromagnet/antiferromagnet bilayers

Exchange bias in ferromagnet/antiferromagnet bilayers

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