Exchange bias in ferromagnet/antiferromagnet bilayers

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

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.

Keywords: exchange bias ferromagnet antiferromagnet bilayers

Received: 17 September 2013
Revised: 25 November 2013
Accepted manuscript online:

PACS:	75.30.Et	(Exchange and superexchange interactions)
	75.30.Gw	(Magnetic anisotropy)
	75.60.Jk	(Magnetization reversal mechanisms)

Fund: 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).

Corresponding Authors: Zhou Shi-Ming
E-mail: shiming@tongji.edu.cn

About author: 75.30.Et; 75.30.Gw; 75.60.Jk

Cite this article:

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

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Exchange bias in ferromagnet/antiferromagnet bilayers

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