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arXiv 1609.04834cond-mat.mtrl-sci
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金属反铁磁体FeMn的自旋输运

Spin Transport through the metallic antiferromagnet FeMn

H. Saglam, W. Zhang, M. B. Jungfleisch, J. Sklenar, J. E. Pearson, J. B. Ketterson, A. Hoffmann

摘要:

利用自旋抽运结合逆自旋霍尔效应的方法研究了Ni 80 Fe 20/FeMn/W三层膜中金属反铁磁体的自旋输运.与FeMn相比,W中的自旋霍尔效应的相对大的幅度和相反的符号使得能够明确地检测通过整个FeMn层厚度传输的自旋电流。使用这种方法,我们可以检测到两个截然不同的自旋输运制度,我们与电子和磁振子自旋电流分别。后者可以延伸到相对较大的距离(高达9 nm),并增强反铁磁有序温度接近测量温度时。

英文摘要:

We investigate spin transport through metallic antiferromagnets using measurements based on spin pumping combined with inverse spin Hall effects in Ni80Fe20/FeMn/W trilayers. The relatively large magnitude and opposite sign of spin Hall effects in W compared to FeMn enable an unambiguous detection of spin currents transmitted through the entire FeMn layer thickness. Using this approach we can detect two distinctively different spin transport regimes, which we associate with electronic and magnonic spin currents respectively. The latter can extend to relatively large distances (up to 9 nm) and is enhanced when the antiferromagnetic ordering temperature is close to the measurement temperature.

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