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Title

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

AuthorsRamos, R.; Kikkawa, T.; Anadón, A.; Lucas, I.; Niizeki, T.; Uchida, K.; Algarabel, Pedro A. ; Morellón, Luis; Aguirre, Myriam H.; Ibarra, M. Ricardo; Saitoh, E.
Issue Date2019
PublisherAIP Publishing
CitationApplied Physics Letters 114(11): 113902 (2019)
AbstractWe have studied the anomalous Nernst effect (ANE) in [Fe3O4/Pt]-based heterostructures grown at high temperature, 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 ANEs from the ferromagnetic layers or magnetic proximity effects can be detected. 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 in the metallic layer, possibly driven by a heat induced subnanometer interdiffusion which affects the nature of the Fe3O4/Pt interface. Despite 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 voltage in the multilayers.
Publisher version (URL)https://doi.org/10.1063/1.5063553
URIhttp://hdl.handle.net/10261/202224
DOI10.1063/1.5063553
ISSN0003-6951
E-ISSN1077-3118
Appears in Collections:(ICMA) Artículos
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