Temperature dependence of multi-jump magnetic switching process in epitaxial Fe/MgO (001) films
Temperature dependence of multi-jump magnetic switching process in epitaxial Fe/MgO (001) films
复制标题
外延 Fe/MgO (001) 薄膜中多跳磁开关过程的温度依赖性
DOI:
10.1088/1674-1056/24/7/077502
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发表时间:
2015-05
影响因子:
1.7
通讯作者:
Cheng Zhao-Hua
中科院分区:
文献类型:
--
作者:
Hu Bo;He Wei;Ye Jun;Tang Jin;Zhang Yong-Sheng;Ahmad Syed Sheraz;Zhang Xiang-Qun;Cheng Zhao-Hua
Temperature dependence of magnetic switching processes with multiple jumps in Fe/MgO (001) films is investigated by magnetoresistance measurements. When the temperature decreases from 300 K to 80 K, the measured three-jump hysteresis loops turn into two-jump loops. The temperature dependence of the fourfold in-plane magnetic anisotropy constant K1, domain wall pinning energy, and an additional uniaxial magnetic anisotropy constant KU are responsible for this transformation. The strengths of K1 and domain wall pinning energy increase with decreasing temperature, but KU remains unchanged. Moreover, magnetization reversal mechanisms, with either two successive or two separate 90° domain wall propagation, are introduced to explain the multi-jump magnetic switching process in epitaxial Fe/MgO(001) films at different temperatures.
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