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Chin. Phys. B, 2013, Vol. 22(7): 077503    DOI: 10.1088/1674-1056/22/7/077503
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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
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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