Dresden 2003 – wissenschaftliches Programm
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MA: Magnetismus
MA 26: Elektronentheorie
MA 26.11: Vortrag
Donnerstag, 27. März 2003, 17:45–18:00, HSZ/401
Electronic and magnetic properties of ferromagnet/semiconductor interfaces — •Michal Košuth1, Voicu Popescu1, Hubert Ebert1, Rudolf Zeller2, and Peter.H. Dederichs2 — 1Department Chemie/Physikalische Chemie, Universität München, Butenandstr. 11, D-81377 München, Germany — 2Inst. für Festkörperforschung, Forschungszentrum Jülich, Post fach 1913, D-52425 Jülich, Germany
The electronic and magnetic properties of ferromagnet-semiconductor heterostructure systems have been studied using the fully-relativistic TB-KKR band structure method. Concerning the resulting magnetisation profiles of multilayer and trilayer (FM/SC/FM) systems the most important features are that no magnetically dead layers occurred and an appreciable induced magnetisation was found in the semiconductor subsystem. Investigating the hyperfine interaction and the magnetic circular dichroism (MCXD) more detailed information on the electronic structure could be obtained. Calculating in addition the magneto-crystalline anisotropy energy for thin layers of a ferromagnet on a semiconductor substrate allows comparison with recent experimental results. Similar to metallic multilayer systems it could be shown that the magneto-crystalline anisotropy correlates very well with the anisotropy of the orbital moment.