First principles study of the electric field effect on magnetization and magnetic anisotropy of FeCo/MgO(001) thin film
First principles study of the electric field effect on magnetization and magnetic anisotropy of FeCo/MgO(001) thin film
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DOI：
10.1063/1.3626598
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发表时间：
2011-08-15
影响因子：
4
通讯作者：
Feng, Y. P.
中科院分区：
文献类型：
--
作者：
He, K. H.;Chen, J. S.;Feng, Y. P.
采用第一性原理计算方法研究了FeCo/MgO（001）薄膜在电场作用下的磁化强度和磁各向异性。三种不同的界面配置被认为是：Co/Fe/MgO，Fe/Co/MgO，和FeCo/FeCo/MgO。结果表明，垂直各向异性对所有构型都是优先的，并且随着电场的增加而增强，这与实验结果一致。此外，我们的计算表明，FeCo/FeCo/MgO是最稳定的结构，具有最大的垂直磁各向异性能。结果还表明，FeCo/FeCo/MgO和Fe/Co/MgO结构的磁电系数比Co/Fe/MgO结构的磁电系数和Fe/MgO界面的磁电系数大。(C)2011年美国物理学会。[doi：10.1063/1.3626598]
The magnetization and magnetic anisotropy of FeCo/MgO(001) thin film under electric field were investigated by the first-principles calculations. Three different interface configurations were considered: Co/Fe/MgO, Fe/Co/MgO, and FeCo/FeCo/MgO. It was found that the perpendicular anisotropy was preferred for all the configurations and enhanced with increasing electric field, which was consistent with experimental results. Furthermore, our calculations indicated that the FeCo/FeCo/MgO was the most stable configuration and had the largest perpendicular magnetic anisotropy energy. The results also showed that the FeCo/FeCo/MgO and Fe/Co/MgO configurations had larger magnetoelectric coefficients than those of the Co/Fe/MgO configuration and previous report about the Fe/MgO interface. (C) 2011 American Institute of Physics. [doi:10.1063/1.3626598]