Anti-damping spin transfer torque through epitaxial nickel oxide
Anti-damping spin transfer torque through epitaxial nickel oxide
复制标题
DOI：
10.1063/1.4918990
复制
发表时间：
2015-04-20
影响因子：
4
通讯作者：
Ono, Teruo
中科院分区：
文献类型：
--
作者：
Moriyama, Takahiro;Takei, So;Ono, Teruo
制备了高质量的MgO（001）[100]/Pt（001）[100]/NiO（001）[100]/FeNi/SiO2外延薄膜，研究了NiO反铁磁绝缘层中的自旋输运。铁磁共振测量的FeNi下的自旋电流注入从Pt的自旋霍尔效应揭示了铁磁共振线宽的变化取决于自旋电流注入的量。结果可以解释为通过NiO存在角动量转移。我们在外延NiO中观察到的高效角动量转移可以归因于注入自旋电流的反铁磁磁矩和自旋量子化轴的明确取向。(C)2015年AIP Publishing LLC。
We prepare the high quality epitaxial MgO(001)[100]/Pt(001)[100]/NiO(001)[100]/FeNi/SiO2 films to investigate the spin transport in the NiO antiferromagnetic insulator. The ferromagnetic resonance measurements of the FeNi under a spin current injection from the Pt by the spin Hall effect revealed the change of the ferromagnetic resonance linewidth depending on the amount of the spin current injection. The results can be interpreted that there is an angular momentum transfer through the NiO. A high efficient angular momentum transfer we observed in the epitaxial NiO can be attributed to the well-defined orientation of the antiferromagnetic moments and the spin quantization axis of the injected spin current. (C) 2015 AIP Publishing LLC.