Effective exchange fields in spin-torque resonance of magnetic insulators

Takahiro Chiba, Gerrit E.W. Bauer, Saburo Takahashi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We report additional results on the spin-torque ferromagnetic resonance (ST-FMR) of a bilayer system made from a magnetic insulator such as Y3Fe5O12 (YIG) and a heavy normal metal such as Pt in terms of the interface spin-mixing conductance and including spin pumping. We analyze experimental ST-FMR spectra for out-of-plane and in-plane magnetization configurations in terms of an anisotropic imaginary part Gi of the mixing conductance (or interface effective field). The estimated ratio between imaginary and real parts Gi/Gr≲0.3 is sensitive to an (unknown) phase shift between microwave current bias and associated Oersted field.

Original languageEnglish
Pages (from-to)163-167
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume400
DOIs
Publication statusPublished - 2016 Feb 15

Keywords

  • Spin-Hall magnetoresistance
  • Spin-mixing conductance
  • Spin-torque ferromagnetic resonance
  • Yttrium iron garnet

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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