Spin pumping without three-magnon splitting in polycrystalline Bi 1Y 2Fe 5O 12/Pt bilayer structure

Ryo Iguchi, Kazuya Ando, Ryo Takahashi, Toshu An, Eiji Saitoh, Tetsuya Sato

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Spin pumping at various precession frequencies has been investigated in a polycrystalline Bi-substituted yttrium iron garnet (Bi.YIG)/Pt bilayer structure by means of inverse spin Hall effect (ISHE) with comparison to a single crystal La-substituted yttrium iron garnet (La.YIG)/Pt bilayer structure which shows three-magnon splitting. As precession frequency decreases, the magnitude of pumped spin currents in the polycrystalline sample continuously increases to high magnitude comparable to the highest magnitude in the single crystal sample while that in the single crystal sample decreases below a threshold frequency of three-magnon splitting. By comparing ISHE voltage with microwave absorption intensity in the polycrystalline sample, we verify that the large magnitude of the pumped spin currents is maintained at low frequencies through the suppression of three-magnon splitting.

Original languageEnglish
Article number103004
JournalJapanese journal of applied physics
Volume51
Issue number10
DOIs
Publication statusPublished - 2012 Oct

ASJC Scopus subject areas

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

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