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arXiv 1407.7028cond-mat.mtrl-sci
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利用在磁场中退火的Ni80Fe20薄膜的自旋泵浦

Spin pumping using an Ni80Fe20 thin film annealed in a magnetic field

Hideki Shimogiku, Naoyuki Hanayama, Yoshio Teki, Hiroaki Tsujimoto, Eiji Shikoh

摘要:

利用磁场退火的Ni 80 Fe 20薄膜的铁磁共振控制自旋抽运,研究了简单有效的纯自旋电流产生方法。在退火的Pd/Ni 80 Fe 20堆叠结构上使用Ni 80 Fe 20进行自旋泵浦时,发现由于Pd中的逆自旋霍尔效应(ISHE)引起的电动势比未退火的电动势强30%。当Ni 80 Fe 20膜中的局域磁矩的方向与自旋泵浦中的外部磁场之间的角度为零时,在Pd层中产生的自旋电流密度可以是最大的。在磁场中退火是用于增加由自旋泵浦产生的自旋电流密度的方便技术。

英文摘要:

Spin pumping controlled with the ferromagnetic resonance of an Ni80Fe20 thin film annealed in a magnetic field was performed in order to investigate the simple and efficient generation method of the pure spin current. At the spin-pumping using the Ni80Fe20 on an annealed Pd/Ni80Fe20 stacked structure, the electromotive force due to the inverse spin-Hall effect (ISHE) in the Pd was found to be 30% stronger than that without annealing. When the angle between the directions of localized magnetic moments in the Ni80Fe20 film and the external magnetic field in the spin-pumping is zero, the spin injection efficiency into the Pd layer, i.e., the spin current density generated in the Pd layer can be the maximum. The annealing in a magnetic field is a convenient technique for increasing the spin current density generated by the spin pumping.

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