Magnetic-field-induced decrease of the spin Peltier effect in Pt/Y3Fe5 O12 system at room temperature

Ryuichi Itoh, Ryo Iguchi, Shunsuke Daimon, Koichi Oyanagi, Ken Ichi Uchida, Eiji Saitoh

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

We report the observation of magnetic-field-induced decrease of the spin Peltier effect (SPE) in a junction of a paramagnetic metal Pt and a ferrimagnetic insulator Y3Fe5O12 (YIG) at room temperature. For driving the SPE, spin currents are generated via the spin Hall effect from applied charge currents in the Pt layer, and injected into the adjacent thick YIG film. The resultant temperature modulation is detected by a commonly used thermocouple attached to the Pt/YIG junction. The output of the thermocouple shows sign reversal when the magnetization is reversed and linearly increases with the applied current, demonstrating the detection of the SPE signal. We found that the SPE signal decreases with the magnetic field. The observed decreasing rate was found to be comparable to that of the spin Seebeck effect (SSE), suggesting the dominant and similar contribution of the low-energy magnons in the SPE as in the SSE.

Original languageEnglish
Article number184422
JournalPhysical Review B
Volume96
Issue number18
DOIs
Publication statusPublished - 2017 Nov 20

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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