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]...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.展开更多
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
文摘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.
