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

R. Ramos; T. Kikkawa; A. Anadón; I. Lucas; T. Niizeki; K. Uchida; P. A. Algarabel; L. Morellón; M. H. Aguirre; M. R. Ibarra; E. Saitoh

doi:10.1063/1.5063553

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

Materials Science 2019-05-01 v1

Authors: R. Ramos , T. Kikkawa , A. Anadón , I. Lucas , T. Niizeki , K. Uchida , P. A. Algarabel , L. Morellón , M. H. Aguirre , M. R. Ibarra , E. Saitoh

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Abstract

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.

Keywords

nernst effect spintronics oxide interfaces

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@article{arxiv.1809.11059,
  title  = {Interface-induced anomalous Nernst effect in Fe3O4/Pt-based heterostructures},
  author = {R. Ramos and T. Kikkawa and A. Anadón and I. Lucas and T. Niizeki and K. Uchida and P. A. Algarabel and L. Morellón and M. H. Aguirre and M. R. Ibarra and E. Saitoh},
  journal= {arXiv preprint arXiv:1809.11059},
  year   = {2019}
}

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15 pages, 4 figures

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

Abstract

Keywords

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