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The spin-Seebeck effect (SSE) in platinum (Pt) and tantalum (Ta) on yttriumiron garnet (YIG) has been investigated by both externally heating the sample(using an on-chip Pt heater on top of the device) as well as by current-inducedheating. For SSE measurements, external heating is the most common method toobtain clear signals. Here we show that also by current-induced heating it ispossible to directly observe the SSE, separate from the also present spin-Hallmagnetoresistance (SMR) signal, by using a lock-in detection technique. Usingthis measurement technique, the presence of additional 2nd order signals at lowapplied magnetic fields and high heating currents is revealed. These signalsare caused by current-induced magnetic fields (Oersted fields) generated by theused AC-current, resulting in dynamic SMR signals.

Simultaneous detection of the spin-Hall magnetoresistance and the spin-Seebeck effect in Platinum and Tantalum on Yttrium Iron Garnet