Journal
PHYSICAL REVIEW LETTERS
Volume 107, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.066603
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Funding
- DFG [SFB 689, Eb154/23]
- EU [251759 MACALO]
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A Kubo-Greenwood-like equation for the Gilbert damping parameter alpha 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 Fe(1-x)Co(x) 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 alpha when small amounts of substitutional Cu are introduced.
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