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AM: Magnetismus
AM 10: Dünne Schichten I
AM 10.4: Vortrag
Mittwoch, 28. März 2001, 14:45–15:00, S 5.2
Spectroscopic properties of ferromagnet-semiconductor heterostructure systems — •Michal Košuth, Alexander Perlov, Ján Minár, and Hubert Ebert — Physik. Chemie, Universität München, Butenandtstr. 5-13, 81377 München
The electronic and magnetic properties of ferromagnet-semiconductor (FM/SC) heterostructure multilayer systems have been studied by means of fully relativistic LMTO as well as scalar-relativistic KKR-CPA band structure calculations. Concerning the resulting magnetisation profiles of Fe/(GaAs) and other related systems the most important features are that no magnetically dead layers occurred and an appreciable induced magnetisation was found in the semiconductor subsystem. By investigation of the hyperfine interaction it is expected to get more detailed information on the electronic structure. To stimulate in addition corresponding experimental work the magnetic circular X-ray dichroism (MCXD) has been investigated for the L2,3-edges absorption spectra of Ga as well as As. In all cases the circular dichroism was found to be pronounced enough to be detectable.