Regensburg 2013 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 28: Magnetic Materials

MA 28.5: Vortrag

Mittwoch, 13. März 2013, 16:00–16:15, H22

First-pinciples calculations of Gilbert damping parameter for magnetic metals and alloys — •Sergiy Mankovsky, Diemo Koedderitzsch, and Hubert Ebert — Dept. Chemie, Universität München, Butenandtstr. 5-13, D-81377 München, Germany

The results of first-principles calculations of the elements of the Gilbert damping tensor, α_νν, are presented. Calculations have been performed for various systems, e.g., pure 3d transition metals, magnetic alloy systems and magnetic semiconductors. The anisotropy of the Gilbert damping and its dependence on the orientation of the magnetization and structure parameters, have been analyzed. Furthermore, the role of chemical and temperature induced structural and magnetic disorder has been investigated. The corresponding scattering mechanisms have been accounted for by using the coherent potential approximation (CPA) alloy theory. The theoretical results for the Gilbert damping parameters are compared with available experimental data.