Transverse spin Seebeck effect versus anomalous and planar Nernst effects in Permalloy thin films

Transverse magnetothermoelectric effects are studied in Permalloy thin films grown on MgO and GaAs substrates and compared to those grown on suspended SiN(x) membranes. The transverse voltage along platinum strips patterned on top of the Permalloy films is measured versus the external magnetic field...

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Bibliographic Details
Published in:Physical review letters 2013-11, Vol.111 (18), p.187201-187201, Article 187201
Main Authors: Schmid, M, Srichandan, S, Meier, D, Kuschel, T, Schmalhorst, J-M, Vogel, M, Reiss, G, Strunk, C, Back, C H
Format: Article
Language:English
Subjects:
Alloys - chemistry
Arsenicals - chemistry
Electrochemistry
Gallium - chemistry
Magnesium Oxide - chemistry
Magnetics
Membranes, Artificial
Thermodynamics
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Summary:Transverse magnetothermoelectric effects are studied in Permalloy thin films grown on MgO and GaAs substrates and compared to those grown on suspended SiN(x) membranes. The transverse voltage along platinum strips patterned on top of the Permalloy films is measured versus the external magnetic field as a function of the angle and temperature gradients. After the identification of the contribution of the planar and anomalous Nernst effects, we find an upper limit for the transverse spin Seebeck effect, which is several orders of magnitude smaller than previously reported.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.111.187201