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Berlin 2008 – scientific programme

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MA: Fachverband Magnetismus

MA 20: Multiferroics

MA 20.14: Talk

Wednesday, February 27, 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 Tjeng11II. 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.

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