Interface-induced anomalous Nernst effect in Fe3O4/Pt-based heterostructures

R. Ramos , T. Kikkawa , A. Anad\'on , I. Lucas , T. Niizeki , K. Uchida , P. A. Algarabel , L. Morell\'on

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M. H. Aguirre M. R. Ibarra E. Saitoh

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classification ❄️ cond-mat.mtrl-sci

keywords fe3o4effectvoltageanomalousconfigurationfieldheterostructuresinterface-induced

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We have studied the anomalous Nernst effect (ANE) in [Fe3O4/Pt]-based heterostructures, by measuring the ANE-induced electric field with a magnetic field applied normal to the sample surface, in the perpendicular magnetized configuration, where only the ANE is expected. An ANE voltage is observed for [Fe3O4/Pt]n multilayers, and we further investigated its origin by performing measurements in [Fe3O4/Pt/Fe3O4] trilayers as a function of the Pt thickness. Our results suggest the presence of an interface-induced ANE. Despite of this ANE, the spin Seebeck effect is the dominant mechanism for the transverse thermoelectric voltage in the in-plane magnetized configuration, accounting for about 70 % of the measured voltage in the multilayers.

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Interface-induced anomalous Nernst effect in Fe3O4/Pt-based heterostructures

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