Regensburg 2010 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 17: Spin Dynamics / Spin Torque II

MA 17.15: Vortrag

Mittwoch, 24. März 2010, 18:15–18:30, H10

Calculation of damping parameter in bulk-Gd — •Jonas Seib and Manfred Fähnle — Max-Planck-Institut für Metallforschung, Heisenbergstr. 3, 70569 Stuttgart

We calculate a damping matrix for the 5d6s-valence magnetic moment in bulk-Gd within the Breathing Fermi Surface model. This model describes the damping in magnetization dynamics caused by the creation of intraband electron-hole pairs in the low temperature limit. It has been shown that the creation of electron-hole pairs is the dominant contribution to damping in 3d transition metals [1]. In an approach similar to the sd-model, we get from the valence moment damping parameter to a damping parameter for the 4f magnetic moment which contributes the main part to the total magnetic moment.

[1] K. Gilmore, Y.U. Idzerda, and M.D. Stiles, Phys. Rev. Lett. 99, 027204 (2007).