Unified first-principles study of gilbert damping, spin-flip diffusion, and resistivity in transition metal alloys

Anton A. Starikov, Paul J. Kelly, Arne Brataas, Yaroslav Tserkovnyak, Gerrit E.W. Bauer

Research output: Contribution to journalArticlepeer-review

87 Citations (Scopus)

Abstract

Using a formulation of first-principles scattering theory that includes disorder and spin-orbit coupling on an equal footing, we calculate the resistivity ρ, spin-flip diffusion length lsf, and Gilbert damping parameter α for Ni1-xFex substitutional alloys as a function of x. For the technologically important Ni 80Fe20 alloy, Permalloy, we calculate values of ρ=3.5±0.15μΩcm, lsf=5.5±0.3nm, and α=0.0046±0.0001 compared to experimental low-temperature values in the range 4.2-4.8μΩcm for ρ, 5.0-6.0 nm for lsf, and 0.004-0.013 for α, indicating that the theoretical formalism captures the most important contributions to these parameters.

Original languageEnglish
Article number236601
JournalPhysical review letters
Volume105
Issue number23
DOIs
Publication statusPublished - 2010 Dec 2
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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