Topology-like dynamical behavior of magnetization reversal inexchange-bias systems

doi:10.1088/1674-1056/22/7/077503

Abstract In an exchange-bias system, the barriers with intrinsic potential energy may be asymmetric due to unidirectional anisotropy. Base on Stoner-Wohlfarth model, we show that the asymmetric barriers may lead to four kinds of dynamical process underlying the hysteresis-loop measurement. These kinds of dynamical process are different in a topology-like property, which can be controlled by the orientation of the external field. In our study, a new analysis approach has been proposed to reveal the dynamical behaviors of magnetization reversal. With this approach, coercivity, exchange-bias field, and asymmetry of hysteresis loop can be quantitatively obtained.

Keywords: exchange-bias system intrinsic energy potential magnetization reversal

Received: 20 November 2012
Revised: 31 December 2012
Accepted manuscript online:

PACS:	75.70.Cn	(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
	75.30.Gw	(Magnetic anisotropy)
	75.30.Et	(Exchange and superexchange interactions)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10974170 and 11104239) and the Natural Science Foundation of Jiangsu Province, China (Grant No. 09KJB140011).

Corresponding Authors: Hu Jing-Guo
E-mail: jghu@yzu.edu.cn

Cite this article:

Su Yuan-Chang (苏垣昌), Zhang Li-Juan (张丽娟), Yang Xin (杨鑫), Pan Jing (潘靖), Hu Jing-Guo (胡经国) Topology-like dynamical behavior of magnetization reversal inexchange-bias systems 2013 Chin. Phys. B 22 077503

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