First-principles study of magnetization relaxation enhancement and spin transfer in thin magnetic films

M. Zwierzycki, Yaroslav Tserkovnyak, Paul J. Kelly, Arne Brataas, Gerrit E.W. Bauer

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Abstract

The interface-induced magnetization damping of thin ferromagnetic films in contact with normal-metal layers is calculated from first principles for clean and disordered Fe/Au and Co/Cu interfaces. Interference effects arising from coherent scattering turn out to be very small, consistent with a very small magnetic coherence length. Because the mixing conductances which govern the spin transfer are to a good approximation real-valued, the spin pumping can be described by an increased Gilbert damping factor but an unmodified gyromagnetic ratio. The results also confirm that the spin-current-induced magnetization torque is an interface effect.
Original languageUndefined
Pages (from-to)064420-1-064420-11
Number of pages11
JournalPhysical review B: Condensed matter and materials physics
Volume71
Issue number6
DOIs
Publication statusPublished - 2005

Keywords

  • METIS-223664
  • IR-50267

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