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

Meier D, Reinhardt D, van Straaten M, Klewe C, Althammer M, Schreier M, Goennenwein STB, Gupta A, Schmid M, Back CH, Schmalhorst J-M, et al. (2015)
Nature Communications 6.

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Abstract
The spin Seebeck effect, the generation of a spin current by a temperature gradient, has attracted great attention, but the interplay over a millimetre range along a thin ferromagnetic film as well as unintended side effects which hinder an unambiguous detection have evoked controversial discussions. Here, we investigate the inverse spin Hall voltage of a 10 nm thin Pt strip deposited on the magnetic insulators Y3Fe5O12 and NiFe2O4 with a temperature gradient in the film plane. We show characteristics typical of the spin Seebeck effect, although we do not observe the most striking features of the transverse spin Seebeck effect. Instead, we attribute the observed voltages to the longitudinal spin Seebeck effect generated by a contact tip induced parasitic out-of-plane temperature gradient, which depends on material, diameter and temperature of the tip.
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Meier D, Reinhardt D, van Straaten M, et al. Longitudinal spin Seebeck effect contribution in transverse spin Seebeck effect experiments in Pt/YIG and Pt/NFO. Nature Communications. 2015;6.
Meier, D., Reinhardt, D., van Straaten, M., Klewe, C., Althammer, M., Schreier, M., Goennenwein, S. T. B., et al. (2015). Longitudinal spin Seebeck effect contribution in transverse spin Seebeck effect experiments in Pt/YIG and Pt/NFO. Nature Communications, 6.
Meier, D., Reinhardt, D., van Straaten, M., Klewe, C., Althammer, M., Schreier, M., Goennenwein, S. T. B., Gupta, A., Schmid, M., Back, C. H., et al. (2015). Longitudinal spin Seebeck effect contribution in transverse spin Seebeck effect experiments in Pt/YIG and Pt/NFO. Nature Communications 6.
Meier, D., et al., 2015. Longitudinal spin Seebeck effect contribution in transverse spin Seebeck effect experiments in Pt/YIG and Pt/NFO. Nature Communications, 6.
D. Meier, et al., “Longitudinal spin Seebeck effect contribution in transverse spin Seebeck effect experiments in Pt/YIG and Pt/NFO”, Nature Communications, vol. 6, 2015.
Meier, D., Reinhardt, D., van Straaten, M., Klewe, C., Althammer, M., Schreier, M., Goennenwein, S.T.B., Gupta, A., Schmid, M., Back, C.H., Schmalhorst, J.-M., Kuschel, T., Reiss, G.: Longitudinal spin Seebeck effect contribution in transverse spin Seebeck effect experiments in Pt/YIG and Pt/NFO. Nature Communications. 6, (2015).
Meier, Daniel, Reinhardt, Daniel, van Straaten, Michael, Klewe, Christoph, Althammer, Matthias, Schreier, Michael, Goennenwein, Sebastian T. B., Gupta, Arunava, Schmid, Maximilian, Back, Christian H., Schmalhorst, Jan-Michael, Kuschel, Timo, and Reiss, Günter. “Longitudinal spin Seebeck effect contribution in transverse spin Seebeck effect experiments in Pt/YIG and Pt/NFO”. Nature Communications 6 (2015).
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PMID: 26394541
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