Crystal field effects on spin pumping

Adam B. Cahaya, Alejandro O. Leon, Gerrit E.W. Bauer

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

"Spin pumping" is the injection of spin angular momentum by a time-dependent magnetization into an adjacent normal metal proportional to the spin mixing conductance. We study the role of electrostatic interactions in the form of crystal fields on the pumped spin currents generated by insulators with exchange-coupled local moments at the interface to a metal. The crystal field is shown to render the spin currents anisotropic, which implies that the spin mixing conductance of insulator | normal metal bilayers depends on crystal cut and orientation. We interpret the interface "effective field" (imaginary part of the spin mixing conductance) in terms of the coherent motion of the equilibrium spin density induced by proximity in the normal metal.

Original languageEnglish
Article number144434
JournalPhysical Review B
Volume96
Issue number14
DOIs
Publication statusPublished - 2017 Oct 26

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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