Demonstration of STTG (IMAGE)
Caption
(a) Schematic diagram showing the concept of Seebeck-driven transverse thermoelectric generation (STTG). The charge current induced by the Seebeck effect in the thermoelectric material generates a large thermoelectric voltage in the magnetic material in the direction perpendicular to a temperature gradient. (b) Transverse thermoelectric voltage as a function of the size ratio between the thermoelectric and magnetic materials. The solid curves were calculated using our phenomenological models describing the STTG and the square symbols were measured in the experiments. (c) Schematic of the sample structure. (d) Comparison between the transverse thermopower for plain Co2MnGa, in which only the anomalous Nernst effect (ANE) appears, and the Co2MnGa-Si hybrid structure, in which both STTG and ANE appear simultaneously.
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NIMS
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