Lock-in thermography measurements of the spin Peltier effect in a compensated ferrimagnet and its comparison to the spin Seebeck effect

A. Yagmur, Ryo Iguchi, S. Geprägs, A. Erb, S. Daimon, E. Saitoh, R. Gross, K. Uchida

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The spin Peltier effect (SPE) in a junction comprising a gadolinium-iron-garnet (GdIG) slab and a Pt film has been investigated around the magnetization compensation temperature of GdIG by means of the lock-in thermography method. When a charge current is applied to the Pt layer, a spin current is generated across the Pt/GdIG interface via the spin Hall effect in Pt. This spin current induces a heat current and a measurable temperature change near the Pt/GdIG interface due to the SPE. The SPE signal in the Pt/GdIG junction shows a sign change around the magnetization compensation temperature, demonstrating the similar temperature dependence of the SPE and the spin Seebeck effect for the Pt/GdIG hybrid system.

Original languageEnglish
Article number194002
JournalJournal of Physics D: Applied Physics
Volume51
Issue number19
DOIs
Publication statusPublished - 2018 Apr 20

Keywords

  • spin Peltier effect
  • spin Seebeck effect
  • spin caloritronics
  • spin current

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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