Regensburg 2007 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 4: Electron Theory of Magnetism

MA 4.6: Vortrag

Montag, 26. März 2007, 11:30–11:45, H23

Influence of correlation effects on spin-orbit induced magnetic properties of disordered systems — •Stanislav Chadov¹, Jan Minár¹, Diemo Ködderitzsch¹, Hubert Ebert¹, and Leonid Pourovskii² — ¹Universität München, Dept. Chemie und Biochemie, Physikalische Chemie, Butenandtstr. 5-13, 81377 München — ²Institute for Molecules and Materials, Radboud University of Nijmegen, NL-6525 ED Nijmegen, The Netherlands

We present results for orbital magnetic moments of the ferromagnets Fe, Co and Ni as well as for disorderd Fe_xCo_1−x alloys calculated within the relativistic full potential Korringa-Kohn-Rostoker (KKR) method using the Coherent Potential Approximation (CPA). Particular attention is paid to the influence of local correlation effects which have a noticable effect on the spin-orbit induced properties of 3d transition metal compounds. Local correlations are taken into account within the framework of the Dynamical Mean Field Theory (DMFT) combined with the KKR in a fully self-consistent scheme. The relativistic version of the DMFT solver used in the present work allows to take into account explicitely the interplay of the spin-orbit coupling and local correlations. Therefore, a more accurate treatment of the orbital magnetic moments is obtained. A corresponding comparison with experimental data is presented.