Enhancement of the spin Peltier effect in multilayers

K. Uchida, R. Iguchi, S. Daimon, R. Ramos, A. Anadón, I. Lucas, P. A. Algarabel, L. Morellón, M. H. Aguirre, M. R. Ibarra, and E. Saitoh
Phys. Rev. B 95, 184437 – Published 30 May 2017

Abstract

The spin Peltier effect (SPE), heat-current generation as a result of spin-current injection, has been investigated in alternately stacked Pt/Fe3O4 multilayer films. The temperature modulation induced by the SPE in the [Pt/Fe3O4]×n films was found to be significantly enhanced with increasing the number of Pt/Fe3O4 bilayers n. This SPE enhancement is much greater than that expected for a simple stack of independent Pt/Fe3O4 bilayers. The observed n dependence of the SPE can be explained by introducing spin-current redistribution in the multilayer films in the thickness direction, in a manner similar to the enhancement of the spin Seebeck effect in multilayers.

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  • Received 26 March 2017
  • Revised 8 May 2017

DOI:https://doi.org/10.1103/PhysRevB.95.184437

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

K. Uchida1,2,3,4,*, R. Iguchi2,†, S. Daimon2,5, R. Ramos5, A. Anadón6,7, I. Lucas6,7,8, P. A. Algarabel7,9, L. Morellón6,7,8, M. H. Aguirre6,7,8,10, M. R. Ibarra6,7,8,10, and E. Saitoh2,3,5,11

  • 1National Institute for Materials Science, Tsukuba 305-0047, Japan
  • 2Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
  • 3Center for Spintronics Research Network, Tohoku University, Sendai 980-8577, Japan
  • 4PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Japan
  • 5WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
  • 6Instituto de Nanociencia de Aragón, Universidad de Zaragoza, E-50018 Zaragoza, Spain
  • 7Departamento de Física de la Materia Condensada, Universidad de Zaragoza, E-50009 Zaragoza, Spain
  • 8Fundación Instituto de Nanociencia de Aragón, E-50018 Zaragoza, Spain
  • 9Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza and Consejo Superior de Investigaciones Científicas, E-50009 Zaragoza, Spain
  • 10Laboratorio de Microscopías Avanzadas, Universidad de Zaragoza, E-50018 Zaragoza, Spain
  • 11Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan

  • *UCHIDA.Kenichi@nims.go.jp
  • Present address: National Institute for Materials Science, Tsukuba 305-0047, Japan.

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Issue

Vol. 95, Iss. 18 — 1 May 2017

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