Perpendicular magnetic anisotropy at the interface between ultrathin Fe film and MgO studied by angular-dependent x-ray magnetic circular dichroism
Perpendicular magnetic anisotropy at the interface between ultrathin Fe film and MgO studied by angular-dependent x-ray magnetic circular dichroism
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DOI：
10.1063/1.4896290
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发表时间：
2014-09-22
影响因子：
4
通讯作者：
Yokoyama, T.
中科院分区：
文献类型：
--
作者：
Okabayashi, J.;Koo, J. W.;Yokoyama, T.
用变角X射线圆二色谱(XMCD)研究了超薄Fe/MgO(001)界面垂直磁各向异性(PMA)。我们发现，由XMCD分析得出的各向异性轨道磁矩贡献了较大的PMA能量，其大小取决于退火温度。由磁化强度测量确定的大的PMA能量与由XMCD和通过自旋-轨道相互作用得到的各向异性轨道磁矩估计的能量有关。各向异性轨道磁矩的增强主要可以用Fe3d(Z)(2)和O2p(Z)态的杂化来解释。(C)2014 AIP出版有限责任公司。
Interface perpendicular magnetic anisotropy (PMA) in ultrathin Fe/MgO (001) has been investigated using angular-dependent x-ray magnetic circular dichroism (XMCD). We found that anisotropic orbital magnetic moments deduced from the analysis of XMCD contribute to the large PMA energies, whose values depend on the annealing temperature. The large PMA energies determined from magnetization measurements are related to those estimated from the XMCD and the anisotropic orbital magnetic moments through the spin-orbit interaction. The enhancement of anisotropic orbital magnetic moments can be explained mainly by the hybridization between the Fe 3d(z)(2) and O 2p(z) states. (C) 2014 AIP Publishing LLC.