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arXiv 1302.6697cond-mat.mes-hallcond-mat.mtrl-sci
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用于自旋泵浦的钇铁石榴石/铂界面的优化

Optimization of the yttrium iron garnet/platinum interface for spin pumping-based applications

M. B. Jungfleisch, V. Lauer, R. Neb, A. V. Chumak, B. Hillebrands

摘要:

定量地研究了在镀铂前对钇铁石榴石(YIG)进行表面处理对自旋泵浦效率和自旋混合电导的影响。铁磁共振驱动的自旋泵浦将自旋极化电流注入到Pt层中,该自旋极化电流通过逆自旋霍尔效应转换为电动势。我们的实验表明,自旋泵浦效应确实强烈地依赖于YIG/Pt界面条件。我们测量的逆自旋霍尔电压和自旋混合电导的两个数量级以上的改进样品制备的增强。

英文摘要:

The dependence of the spin pumping efficiency and the spin mixing conductance on the surface processing of yttrium iron garnet (YIG) before the platinum (Pt) deposition has been investigated quantitatively. The ferromagnetic resonance driven spin pumping injects a spin polarized current into the Pt layer, which is transformed into an electromotive force by the inverse spin Hall effect. Our experiments show that the spin pumping effect indeed strongly depends on the YIG/Pt interface condition. We measure an enhancement of the inverse spin Hall voltage and the spin mixing conductance of more than two orders of magnitude with improved sample preparation.

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