Role of an interfacial FeO layer in the electric-field-driven switching of magnetocrystalline anisotropy at the Fe/MgO interface
Role of an interfacial FeO layer in the electric-field-driven switching of magnetocrystalline anisotropy at the Fe/MgO interface
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DOI：
10.1103/physrevb.81.220409
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发表时间：
2010-06-22
影响因子：
3.7
通讯作者：
Freeman, A. J.
中科院分区：
文献类型：
--
作者：
Nakamura, Kohji;Akiyama, Toru;Freeman, A. J.
通过第一性原理计算，研究了Fe/MgO（001）系统的电场诱导磁晶各向异性（MCA）在面内和面外取向之间的转变.我们的研究结果预测，一个理想的突变Fe/MgO界面引起一个大的面外MCA由于弱Fe-O杂化在界面上，但MCA开关由外加电场被发现是难以实现的。相反，界面FeO层的存在起着关键作用，在演示MCA开关，伴随着电场诱导的位移的Fe原子的界面FeO层。
The electric-field-induced switching of magnetocrystalline anisotropy (MCA) between in-plane and out-of-plane orientations is investigated by first-principles calculations for the prototypical Fe on MgO(001) system. Our results predict that an ideal abrupt Fe/MgO interface gives rise to a large out-of-plane MCA due to weak Fe-O hybridization at the interface, but the MCA switching by an applied electric field is found to be difficult to achieve. Instead, the existence of an interfacial FeO layer plays a key role in demonstrating the MCA switching that accompanies an electric-field-induced displacement of Fe atoms on the interfacial FeO layer.