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

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

中国物理B ›› 2013, Vol. 22 ›› Issue (7): 77503-077503.doi: 10.1088/1674-1056/22/7/077503

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

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

苏垣昌^a, 张丽娟^a, 杨鑫^b, 潘靖^a, 胡经国^a

a College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China;
b School of Physics and Technology, Nanjing Normal University, Nanjing 210023, China

收稿日期:2012-11-20 修回日期:2012-12-31 出版日期:2013-06-01 发布日期:2013-06-01
基金资助:
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).

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

Su Yuan-Chang (苏垣昌)^a, Zhang Li-Juan (张丽娟)^a, Yang Xin (杨鑫)^b, Pan Jing (潘靖)^a, Hu Jing-Guo (胡经国)^a

a College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China;
b School of Physics and Technology, Nanjing Normal University, Nanjing 210023, China

Received:2012-11-20 Revised:2012-12-31 Online:2013-06-01 Published:2013-06-01
Contact: Hu Jing-Guo E-mail:jghu@yzu.edu.cn
Supported by:
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).

摘要/Abstract

摘要： 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.

关键词: exchange-bias system, intrinsic energy potential, magnetization reversal

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.

Key words: exchange-bias system, intrinsic energy potential, magnetization reversal

中图分类号: (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))

75.70.Cn

75.30.Gw (Magnetic anisotropy) 75.30.Et (Exchange and superexchange interactions)

苏垣昌, 张丽娟, 杨鑫, 潘靖, 胡经国. Topology-like dynamical behavior of magnetization reversal inexchange-bias systems[J]. 中国物理B, 2013, 22(7): 77503-077503.

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[J]. Chin. Phys. B, 2013, 22(7): 77503-077503.

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

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

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