Stress-induced butterfly and square-like magnetostriction loops transition  

作　　者：Zengyao Lv Honglong Zhang Chao Zhang Yongmao Pei 

机构地区：[1]State Key Laboratory for Turbulence and Complex Systems,College of Engineering,Peking University [2]College of Civil Engineering and Transportation,South China University of Technology [3]Department of Engineering Mechanics,Tsinghua University

出　　处：《Theoretical & Applied Mechanics Letters》2017年第2期67-71,共5页力学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(11090331,11522214,11521202,11227801);the Beijing NOVA Program(Z151100000315041);the key subject ‘‘Computational Solid Mechanics’’ of China Academy of Engineering Physics

摘　　要：The stress-induced magnetic domain switching in FeGa thin films is studied using phase-field method. In particular, the magnetic field is applied along the [110] direction and biaxial stresses are applied along [ 100] and [010]. A compressive pre-stress corresponds to a smaller coercive magnetic field while a tensile pre-stress corresponded to a larger coercive field. At the same time, it is also found that the transition between butterfly and square-like magnetostriction loops occurs at the critical opposite biaxial stress state. The two different evolutions correspond to two different mechanisms： one is that the single domain swings across a fan area back and forth; the other is that the single domain turns a clockwise circle. The results can be explained bv the stress tuned anisotronv energy well.The stress-induced magnetic domain switching in FeGa thin films is studied using phase-field method. In particular, the magnetic field is applied along the [110] direction and biaxial stresses are applied along [ 100] and [010]. A compressive pre-stress corresponds to a smaller coercive magnetic field while a tensile pre-stress corresponded to a larger coercive field. At the same time, it is also found that the transition between butterfly and square-like magnetostriction loops occurs at the critical opposite biaxial stress state. The two different evolutions correspond to two different mechanisms： one is that the single domain swings across a fan area back and forth; the other is that the single domain turns a clockwise circle. The results can be explained bv the stress tuned anisotronv energy well.

关 键 词：Biaxial-stress Magneto-mechanical loading Phase-field simulation 

分 类 号：O484[理学—固体物理]