Ab initio calculation of the Gilbert damping parameter via the linear response formalism

H. Ebert, S. Mankovsky, D. Ködderitzsch, Paul J. Kelly

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Abstract

A Kubo-Greenwood-like equation for the Gilbert damping parameter α is presented that is based on the linear response formalism. Its implementation using the fully relativistic Korringa-Kohn-Rostoker band structure method in combination with coherent potential approximation alloy theory allows it to be applied to a wide range of situations. This is demonstrated with results obtained for the bcc alloy system Fe1−xCox as well as for a series of alloys of Permalloy with 5d transition metals. To account for the thermal displacements of atoms as a scattering mechanism, an alloy-analogy model is introduced. The corresponding calculations for Ni correctly describe the rapid change of α when small amounts of substitutional Cu are introduced.
Original languageUndefined
Pages (from-to)066603/1-066603/4
Number of pages4
JournalPhysical review letters
Volume107
Issue number6
DOIs
Publication statusPublished - 2011

Keywords

  • METIS-277809
  • IR-104493

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