Berlin 2008 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 20: Multiferroics
MA 20.14: Vortrag
Mittwoch, 27. Februar 2008, 17:30–17:45, EB 202
Polarization-dependent X-Ray Absorption Spectroscopy of MnWO4 — •Nils Hollmann1, Zhiwei Hu1, Ladislav Bohaty2, Petra Becker-Bohaty2, Arata Tanaka3, and Liu Hao Tjeng1 — 1II. Physikalisches Institut, Universität zu Köln — 2Kristallographisches Institut, Universität zu Köln — 3Department of Quantum Matter, Hiroshima University
Multiferroic materials which combine magnetism and ferroelectricity currently attract considerable attention.
One of the recently discovered multiferroic materials is MnWO4 (Hübnerite). It belongs to the group
of multiferroics where a spontaneous electric polarization is caused by a spiral magnetic structure with a spin
rotation axis not coinciding with the propagation vector.
To investigate the details of this astonishing combination of electronic and magnetic properties, we look at the electronic
structure with the use of polarization-dependent X-ray absorption spectroscopy on single crystals of MnWO4. The analysis
of the experimental data on the L-edge of Mn is done by a configuration interaction calculation and will be discussed
during the talk.