Hamburg 2001 – wissenschaftliches Programm

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AM: Magnetismus

AM 1: Spektroskopie I & II

AM 1.10: Vortrag

Montag, 26. März 2001, 12:15–12:30, S 5.2

Symmetry in No-dqmagneticNo-dq core-level XPS — •H. Meinert¹, A. Perez¹, R. Schellenberg², and E. Kisker¹ — ¹Institut für Angewandte Physik, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf — ²Vacuumschmelze GmbH, 63450 Hanau

For mirrored x-ray incidence directions onto an epitaxial FeNi(001) film obtained by using one x-ray tube mounted to the left and a second one to the right side of the plane spanned by the magnetization direction and the photoelectron wave vector, we have measured the emission-angle dependencies of the Fe 2p_3/2 and the Fe 3p core level photoelectron intensity asymmetries that occur upon reversal of the magnetization. The photoelectron-diffraction determined intensity asymmetry distributions show the typical left-right asymmetry with respect to low-index crystallographic directions /1/. The Fe 2p_3/2 angular distributions obtained with the left and with the right source, respectively, differ considerably from each other. However, they transform into each other when reversing the signs of the magnetization and of the photoelectron emission angle. We show that is a consequence of parity conservation.

Supported by the DFG and by the MSWWF, NRW.

1. R. Schellenberg et al., Phys. Rev. B57, 14310 (1998).