Longitudinal spin Seebeck effect contribution in transverse spin Seebeck effect experiments in Pt/YIG and Pt/NFO

We investigate the inverse spin Hall voltage of a 10nm thin Pt strip deposited on the magnetic insulators Y3Fe5O12 (YIG) and NiFe2O4 (NFO) with a temperature gradient in the film plane. We observe characteristics typical of the spin Seebeck effect, although we do not observe a change of sign of the...

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Published in:arXiv.org 2014-11
Main Authors: Meier, Daniel, Reinhardt, Daniel, Michael van Straaten, Klewe, Christoph, Althammer, Matthias, Schreier, Michael, Goennenwein, Sebastian T B, Gupta, Arunava, Schmid, Maximilian, Back, Christian H, Jan-Michael Schmalhorst, Kuschel, Timo, Reiss, Günter
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Language:English
Subjects:
Electric potential
Insulators
Nickel ferrites
Seebeck effect
Temperature gradients
Thermal energy
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creator Meier, Daniel
Reinhardt, Daniel
Michael van Straaten
Klewe, Christoph
Althammer, Matthias
Schreier, Michael
Goennenwein, Sebastian T B
Gupta, Arunava
Schmid, Maximilian
Back, Christian H
Jan-Michael Schmalhorst
Kuschel, Timo
Reiss, Günter
description We investigate the inverse spin Hall voltage of a 10nm thin Pt strip deposited on the magnetic insulators Y3Fe5O12 (YIG) and NiFe2O4 (NFO) with a temperature gradient in the film plane. We observe characteristics typical of the spin Seebeck effect, although we do not observe a change of sign of the voltage at the Pt strip when it is moved from hot to cold side, which is believed to be the most striking feature of the transverse spin Seebeck effect. Therefore, we relate the observed voltages to the longitudinal spin Seebeck effect 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. This work gives new insights into the interpretation of transverse spin Seebeck effect experiments, which are still under discussion.
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subjects Electric potential
Insulators
Nickel ferrites
Seebeck effect
Temperature gradients
Thermal energy
title Longitudinal spin Seebeck effect contribution in transverse spin Seebeck effect experiments in Pt/YIG and Pt/NFO
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