Berlin 2015 – scientific programme
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MA: Fachverband Magnetismus
MA 29: Spincaloric Transport II (jointly with TT)
MA 29.6: Talk
Wednesday, March 18, 2015, 16:15–16:30, H 0110
Longitudinal spin Seebeck effect contribution in transverse spin Seebeck effect experiments in Pt/YIG and Pt/NFO — •Daniel Meier1, Daniel Reinhardt1, Michael van Straaten1, Christoph Klewe1, Matthias Althammer2, Michael Schreier2, Sebastian T. B. Goennenwein2, Arunava Gupta3, Maximilian Schmid4, Christian H. Back4, Jan-Michael Schmalhorst1, Timo Kuschel1, and Günter Reiss1 — 1CSMD, Physics Department, Bielefeld University, Germany — 2Walther-Meißner-Institut, BAdW, Germany — 3MINT Center, University of Alabama, USA — 4Department of Physics, University of Regensburg, Germany
We investigated the inverse spin Hall voltage generated in a 10 nm thin Pt strip deposited on the magnetic insulators Y3Fe5O12 (YIG) and NiFe2O4 (NFO) with a temperature gradient in the film plane. We observed characteristics typical of the spin Seebeck effect (SSE), although we did not observe a change of sign of the voltage at the Pt strip when the direction of the heat flow was reversed, which is believed to be the most striking feature of the transverse SSE. Therefore, we relate the observed signals to the longitudinal SSE generated by a parasitic out-of-plane temperature gradient, which can be simulated by contact tips of different material and heat conductivities and by tip heating [1]. This work [2] gives new insights into the interpretation of transverse spin Seebeck effect experiments, which are still under discussion.
[1] D. Meier et al., Phys. Rev. B 88, 184425 (2013)
[2] D. Meier et al., arXiv:1411.6790 (2014)