Thermal spin transfer torque in Fe|Ag|YIG multilayers
Hui-Min Tang, Xing-Tao Jia, Shi-Zhuo Wang
Thermal spin transfer torque in Fe|Ag|YIG multilayers
We investigated the thermal spin transfer effect in FM|NM|YIG multilayers using the first principles scattering theory. At room temperature, the spin Seebeck torque TSSE~1.0 μJ/(K·m2) in an Ag|Fe|Ag|YIG multilayer, which is around 40% larger than that estimated from mixing conductance. The quantum effects such as interlayer exchange coupling between FM and YIG could be responsible for the enhancements. Based on the LLG equation, we predict that a temperature bias of ~10 K can reverse the magnetic configurations, circularly, in a multilayer at room temperature.
spin Seebeck torque / spin transfer torque / YIG
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