Theory of magnon-driven spin Seebeck effect

Theory of magnon-driven spin Seebeck effect
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DOI:
10.1103/physrevb.81.214418
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发表时间:
2010-06-14
期刊:
影响因子:
3.7
通讯作者:
Maekawa, Sadamichi
Maekawa, Sadamichi
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Xiao, Jiang;Bauer, Gerrit E. W.;Maekawa, Sadamichi

文献摘要

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自旋塞贝克效应是由铁磁体中的温度梯度产生的自旋动力,其可以通过反向自旋霍尔效应经由正常金属接触来检测[K. Uchida等人,Nature(伦敦)455,778(2008)]。我们通过与界面的自旋混合电导成比例的接触处的自旋泵浦、依赖于温度的磁相干体积的倒数以及铁磁体中的磁振子温度与正常金属中的电子温度之间的差异来解释这种效应[D. Sanders和D. Walton,B 15,1489(1977)]。
The spin Seebeck effect is a spin-motive force generated by a temperature gradient in a ferromagnet that can be detected via normal metal contacts through the inverse spin Hall effect [K. Uchida et al., Nature (London) 455, 778 (2008)]. We explain this effect by spin pumping at the contact that is proportional to the spin-mixing conductance of the interface, the inverse of a temperature-dependent magnetic coherence volume, and the difference between the magnon temperature in the ferromagnet and the electron temperature in the normal metal [D. J. Sanders and D. Walton, Phys. Rev. B 15, 1489 (1977)].