Berlin 2005 – scientific programme
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MA: Magnetismus
MA 20: Poster:Schichten(1-29),Spintrsp(30-45),Ex-Bias(46-63),Spindyn(64-75),Mikromat.(76-80),Cluster(81-94),Abbv.(95-99),Obflm(100-02),SpElek.(103-09),E-Theo(110-14),Mikromag.(115-16),Spin+PÜ(117-26),Mag.Mat.(127-51),Meth.(152-55),Mol.Mag(156-59),Kondo(160-65
MA 20.16: Poster
Monday, March 7, 2005, 14:00–18:00, Poster TU C
Core-valence interactions in 2p photoemission of 3d metals - a study of magnetic dichroism in spinresolved photoelectron spectroscopy — •C. Bethke1, E. Kisker1, N.B. Weber2, and F.U. Hillebrecht3 — 1Institut für Angewandte Physik, Heinrich-Heine-Universität, Universitätsstraße 1, D-40225 Düsseldorf, Germany — 2Focus GmbH, Am Birkhecker Berg 20, D-65510 Hünstetten, Germany — 3Institut für Festkörperforschung, Forschungszentrum Jülich, D-52425 Jülich, Germany
The magnetic linear and circular dichroism (MLDAD and MCD) in the 2p photoemission spectra of ultrathin 3d metal films have been determined. Although the 3d electrons in transition metals like Fe and Co are itinerant, we can describe the spectra in terms of an atomic model in jj and jK coupling. The results of the model compare reasonably well with the experimental data, especially for iron[1]. Because of the low energy difference between the different p dn configurations in the final state the intensity of the satellite structures is transferred to the two dominant main structures with j = 1/2, 3/2. So for Fe mainly the hybridization between the configurations in the final state main lines is vital to describe the 2p photoemission spectrum. We will show that the fine structure of the measured spectra and the correlation between magnetic dichroism and spin-orbit and exchange induced spinpolarization can be explained in the final state model presuming a pure coupling approximation like jj coupling. Supported by the BMBF under grant no. 05 KS1 PFA 3.
[1] C. Bethke, E. Kisker, N.B. Weber, and F.U. Hillebrecht, Phys. Rev. B, accepted.