单轴与交换各向异性垂直条件下外应力对FM/AFM体系交换偏置的影响  

Effect of the External Stress on the FM/AFM Exchang Bias System Under the Conditions of the Perpendicular Uniaxial Anisotropy and Exchange Anisotropy

作　　者：侯林林[1] 云国宏[2] 

机构地区：[1]内蒙古大学物理科学与技术学院,呼和浩特010021 [2]内蒙古师范大学物理与电子信息学院,呼和浩特010022

出　　处：《内蒙古大学学报（自然科学版）》2012年第3期265-272,共8页Journal of Inner Mongolia University：Natural Science Edition

基　　金：国家自然科学基金资助项目(批准号:10762001);教育部新世纪优秀人才计划(批准号:NCET-2005-0272)

摘　　要：从单轴各向异性、交换各向异性、外应力三方面出发,根据Stoner-Wohlfarth模型及能量极小值原理,主要研究了在单轴各向异性与交换各向异性垂直条件下,改变外应力的方向对铁磁/反铁磁体系交换偏置角度依赖关系的影响.数值计算表明改变外应力的方向,可以使体系在单稳态与双稳态之间转变,导致角度依赖关系发生显著变化.When the uniaxial anisotropy and the exchange anisotropy are perpendicular,using the Stoner-Wohlfarth model and the principle of minimum energy,the effects of the orientation of applied stress on the angular dependence relation of FM/AFM systems exchange bias are studied under considering the following three aspects,i.e.,uniaxial anisotropy,exchange anisotropy,and external stress.The numerical results indicate that there are transitions between the monostable state and the bistable state of FM/AFM systems,and prominent changes in the angular dependence of exchange bias are obtained by change the orientation of applied stress.

关 键 词：外应力 单轴各向异性 交换各向异性 

分 类 号：O482.52[理学—固体物理]