Sign of inverse spin Hall voltages generated by ferromagnetic resonance and temperature gradients in yttrium iron garnet platinum bilayers

Michael Schreier, Gerrit E.W. Bauer, Vitaliy I. Vasyuchka, Joost Flipse, Ken Ichi Uchida, Johannes Lotze, Viktor Lauer, Andrii V. Chumak, Alexander A. Serga, Shunsuke Daimon, Takashi Kikkawa, Eiji Saitoh, Bart J. Van Wees, Burkard Hillebrands, Rudolf Gross, Sebastian T.B. Goennenwein

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

We carried out a concerted effort to determine the absolute sign of the inverse spin Hall effect voltage generated by spin currents injected into a normal metal. We focus on yttrium iron garnet (YIG)|platinum bilayers at room temperature, generating spin currents by microwaves and temperature gradients. We find consistent results for different samples and measurement setups that agree with theory. We suggest a right-hand-rule to define a positive spin Hall angle corresponding to the voltage expected for the simple case of scattering of free electrons from repulsive Coulomb charges.

Original languageEnglish
Article number025001
JournalJournal of Physics D: Applied Physics
Volume48
Issue number2
DOIs
Publication statusPublished - 2015 Jan 21

Keywords

  • Spin Hall effect
  • Spin Seebeck effect
  • Spin pumping

ASJC Scopus subject areas

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

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