Interface-induced anomalous Nernst effect in Fe 3 O 4 /Pt-based heterostructures

Ramos, R. ; Kikkawa, T. ; Anadón, A. ; Lucas, I. (Universidad de Zaragoza) ; Niizeki, T. ; Uchida, K. ; Algarabel, P.A. (Universidad de Zaragoza) ; Morellón, L. (Universidad de Zaragoza) ; Aguirre, M.H. (Universidad de Zaragoza) ; Ibarra, M.R. (Universidad de Zaragoza) ; Saitoh, E.

Resumen: We have studied the anomalous Nernst effect (ANE) in [Fe 3 O 4 /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 [Fe 3 O 4 /Pt] n multilayers, and we further investigated its origin by performing measurements in [Fe 3 O 4 /Pt/Fe 3 O 4 ] 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 Fe 3 O 4 /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.

Idioma: Inglés

DOI: 10.1063/1.5063553

Año: 2019

Publicado en: Applied Physics Letters 114, 11 (2019), 113902
ISSN: 0003-6951

Factor impacto JCR: 3.597 (2019)

Categ. JCR: PHYSICS, APPLIED rank: 37 / 154 = 0.24 (2019) - Q1 - T1

Factor impacto SCIMAGO: 1.343 - Physics and Astronomy (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E26
Financiación: info:eu-repo/grantAgreement/EUR/H2020/FLAG ERA Graphene Flagship PCIN-2015-111 SOgraph
Financiación: info:eu-repo/grantAgreement/EC/H2020/734187/EU/Spin conversion, logic storage in oxide-based electronics/SPICOLOST
Financiación: info:eu-repo/grantAgreement/EUR/H2020/737116-ByAXON
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2017-82970-C2
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2016-78591-C3-1-R-SKYTRON

Tipo y forma: Article (Published version)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)