All-oxide spin Seebeck effects
Abstract
We report the observation of longitudinal spin Seebeck effects (LSSE) in an all-oxide bilayer system comprising an IrO2 film and an Y3Fe5O12 film. Spin currents generated by a temperature gradient across the IrO2/Y3Fe5O12 interface were detected as electric voltage via the inverse spin Hall effect in the conductive IrO2 layer. This electric voltage is proportional to the magnitude of the temperature gradient and its magnetic field dependence is well consistent with the characteristic of the LSSE. This demonstration may lead to the realization of low-cost, stable, and transparent spin-current-driven thermoelectric devices.
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