Enhancement of charge-to-spin current conversion in a Ni/Pt bilayer film detected by spin Peltier effect

Takumi Yamazaki, Ryo Iguchi, Hosei Nagano, Ken Ichi Uchida

Research output: Contribution to journalArticle

Abstract

We demonstrate the enhancement of charge-to-spin current conversion by a ferromagnet/paramagnet interface. The enhancement is confirmed by comparing the spin Peltier effect (SPE) between Ni/Pt/yttrium-iron-garnet (YIG) and Pt/YIG hybrid structures, where the SPE signal is proportional to the spin current generated in the Ni/Pt or Pt layer. The SPE signal normalized by charge current density for the Ni/Pt/YIG system increases by 65% compared to the Pt/YIG system, which cannot be explained by other thermoelectric and thermo-spin effects. This result suggests the presence of additive charge-to-spin current conversion at the Ni/Pt interface, providing simple ways to improve spin-injection efficiency.

Original languageEnglish
Article number050901
JournalJapanese journal of applied physics
Volume59
Issue number5
DOIs
Publication statusPublished - 2020 May 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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