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arXiv 1508.07906cond-mat.mtrl-sci
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各向异性自旋霍尔效应反铁磁体对铁磁体磁化动力学的全电操纵

All electrical manipulation of magnetization dynamics in a ferromagnet by antiferromagnets with anisotropic spin Hall effects

Wei Zhang, Matthias B. Jungfleisch, Frank Freimuth, Wanjun Jiang, Joseph Sklenar, John E. Pearson, John B. Ketterson, Yuriy Mokrousov, Axel Hoffmann

摘要:

利用直流偏置电流调谐的自旋矩铁磁共振研究了金属CuAu-I型反铁磁体的自旋轨道矩。所观察到的自旋力矩主要来自自旋霍尔效应产生的自旋电流的扩散输运。通过研究外延样品,我们发现了自旋力矩的生长取向依赖性,这可能与自旋霍尔效应的各向异性有关。观察到的各向异性是一致的第一性原理计算的内在自旋霍尔效应。我们的工作证明了磁有序材料中的大的可调自旋轨道效应。

英文摘要:

We investigate spin-orbit torques of metallic CuAu-I-type antiferromagnets using spin-torque ferromagnetic resonance tuned by a dc-bias current. The observed spin torques predominantly arise from diffusive transport of spin current generated by the spin Hall effect. We find a growth-orientation dependence of the spin torques by studying epitaxial samples, which may be correlated to the anisotropy of the spin Hall effect. The observed anisotropy is consistent with first-principles calculations on the intrinsic spin Hall effect. Our work demonstrates large tunable spin-orbit effects in magnetically-ordered materials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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