Ebert, Hubert and Mankovsky, Sergiy and Koedderitzsch, Diemo and Kelly, P.J.
Ab Initio Calculation of the Gilbert Damping Parameter via the Linear Response Formalism.
Physical Review Letters (PRL) 107, p. 66603.
Other URL: http://link.aps.org/doi/10.1103/PhysRevLett.107.066603
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.
|Date:||2 August 2011|
|Projects:||SFB 689: Spinphänomene in reduzierten Dimensionen|
|72.25.Rb, 71.20.Be, 71.70.Ej, 75.78.-n ||PACS|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||No|
|Deposited On:||15 May 2012 12:58|
|Last Modified:||22 May 2012 11:43|