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The utilization of ferromagnetic (FM) materials in thermoelectric devicesallows one to have a simpler structure and/or independent control of electricand thermal conductivities, which may further remove obstacles for thistechnology to be realized. The thermoelectricity in FM/non-magnet (NM)heterostructures using an optical heating source is studied as a function of NMmaterials and a number of multilayers. It is observed that the overallthermoelectric signal in those structures which is contributed by spin Seebeckeffect and anomalous Nernst effect (ANE) is enhanced by a proper selection ofNM materials with a spin Hall angle that matches to the sign of the ANE.Moreover, by an increase of the number of multilayer, the thermoelectricvoltage is enlarged further and the device resistance is reduced,simultaneously. The experimental observation of the improvement ofthermoelectric properties may pave the way for the realization of magnetic-(orspin-) based thermoelectric devices.

Thermoelectric Signal Enhancement by Reconciling the Spin Seebeck and Anomalous Nernst Effects in Ferromagnet/Non-magnet Multilayers