Strong spin-dependent electron correlation effects in photoemission from itinerant magnets
Synchrotron Radiation Source, Daresbury Laboratory, Warrington WA4 4AD,
2 Institut für Angewandte Physik, Heinrich-Heine-Universität, 40225 Düsseldorf, Germany
3 European Synchrotron Radiation Facility, BP. 220, F-38043 Grenoble, France
Accepted: 9 September 1997
The Fe 2p photoemission of ferromagnetic iron shows a dichroism which indicates a strong difference in hybridization for spin-up and spin-down electrons. In contrast, the dichroism of the localized Mn surface alloys reveals intense unscreened satellite structure. The spin polarization of the core hole is quantified using the dichroism in the Fe Auger spectrum measured with the light helicity vector perpendicular to the magnetization direction. The observations in the 3d metals are in strong contradiction with the expectations from an independent-particle model.
PACS: 71.70.-d – Level splitting and interactions / 75.25.+z – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.) / 78.20.Ls – Magnetooptical effects
© EDP Sciences, 1997