Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 48: Poster Session II

MA 48.51: Poster

Donnerstag, 10. März 2016, 15:00–18:00, Poster B1

Dependence of transverse magneto-thermoelectric effects on inhomogeneous magnetic fields — •Anatoly Shestakov¹, Maximilian Schmid¹, Daniel Meier², Timo Kuschel², and Christian Back¹ — ¹Institute of Experimental and Applied Physics, University of Regensburg, 93040 Regensburg, Germany — ²Center for Spinelectronic Materials and Devices, Physics Department, Bielefeld University, 33615 Bielefeld, Germany

Transverse magneto-thermoelectric effects, namely Anomalous Nernst Effect (ANE), Anisotropic magneto-thermopower (AMTEP, also known as Planar Nernst effect) and transverse spin Seebeck effect (TSSE), are studied in Permalloy thin films grown on MgO substrates. For the detection of spin-currents Pt strips on top of the Permalloy films are used. We find that small static parasitic magnetic fields below 1 Oe can produce TSSE-like signals of the order of 1% of the amplitude of the AMTEP. The measured artifacts reveal a new source of uncertainties for the detection of the TSSE in conductive ferromagnets. Taking these results into account we conclude that the contribution of the TSSE to the detected voltages is below the noise level of 20 nV.