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arXiv · 1103.3764

Spin transfer torque on magnetic insulators

Xingtao Jia·Kai Liu·Ke Xia·Gerrit E. W. Bauer
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Abstract

Recent experimental and theoretical studies focus on spin-mediated heat currents at interfaces between normal metals and magnetic insulators. We resolve conflicting estimates for the order of magnitude of the spin transfer torque by first-principles calculations. The spin mixing conductance G^\uparrow\downarrow of the interface between silver and the insulating ferrimagnet Yttrium Iron Garnet (YIG) is dominated by its real part and of the order of 10^14 Ω^-1m^-2, i.e. close to the value for intermetallic interface, which can be explained by a local spin model.

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Xingtao Jia, Kai Liu, Ke Xia, Gerrit E. W. Bauer. 2011-09-15. Spin transfer torque on magnetic insulators. https://doi.org/10.1209/0295-5075%2F96%2F17005

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