Electric field dependence of the giant magnetic anisotropy of Ru monolayer on MgO(001) substrate
Electric field dependence of the giant magnetic anisotropy of Ru monolayer on MgO(001) substrate
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DOI：
10.1063/1.4980054
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发表时间：
2017-04
期刊：
影响因子：
1.6
通讯作者：
Y. Kitaoka;H. Imamura
中科院分区：
文献类型：
--
作者：
Y. Kitaoka;H. Imamura
用第一性原理计算方法研究了电场作用下MgO（001）衬底上Ru单层的磁各向异性能（MAE）。由于Ru原子中的自旋轨道耦合较大，MAE及其对电场的变化率都是MgO（001）衬底上Fe单层的3倍左右。Ru/MgO的MAE变化率与Fe/MgO的MAE变化率有相反的符号，这是由于电场作用导致Γ¯点附近费米能附近的能带结构发生了改变。
Magnetic anisotropy energy (MAE) of a Ru monolayer on MgO(001) substrate under the application of an electric field is investigated by using first-principles calculations. Owing to the large spin orbit coupling in Ru atoms, both MAE and its rate of change against electric field are about 3 times as large as those of an Fe monolayer on MgO(001) substrate. The change rate of MAE of Ru/MgO has an opposite sign to that of Fe/MgO, which originates from the modification of the band structure near the Fermi energy around Γ ¯ point caused by the application of an electric field.