自旋-轨道耦合引起的MgO-based磁性隧道结的各向异性磁电阻
Anisotropic magneto-resistance in MgO-based magnetic tunnel junctions induced by spin-orbit coupling
摘要：
利用第一性原理研究了Ag（Ir，Pt）$/$ MgO $/$ Fe结的隧穿各向异性磁电阻（TAMR）.在面内和面外分别发现了理想和偏斜四倍角度依赖的增强TAMR，在某些结中表现出简单的势垒厚度依赖性，势垒数约为10%.由于自旋-轨道耦合的界面共振态的复杂的角度依赖性应该负责在这些结中发现的复杂和增强的TAMR。
英文摘要：
We performed a first-principles study of the tunneling anisotropic magneto-resistance (TAMR) in Ag(Ir,Pt)$/$MgO$/$Fe junctions. Enhanced TAMR with ideal and skewed fourfold angular dependence is found in-plane and out-of-plane TAMR of the system, respectively, which shows simple barrier thickness dependency with number around 10\% in some junctions. The complex angular dependency of the interfacial resonant states due to the spin-orbit coupling should be responsible to the complex and enhanced TAMR found in these junctions.
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