Spin transfer torque on magnetic insulators

Details Spin transfer torque on magnetic insulators Spin transfer torque on magnetic insulators

2011-03-19

arxiv.org/abs/1103.3764v2

EPL, 96 (2011) 17005

Physics

Condensed Matter

Materials Science

4 pages, 4 figures, 2 tables

Scientific paper

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 \Omega^-1m^-2, i.e. close to the value for intermetallic interface, which can be explained by a local spin model.

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