Regensburg 2010 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 8: [MA] Multiferroics II (Joint Session of MA/DF/KR/DS)

DS 8.10: Vortrag

Montag, 22. März 2010, 16:30–16:45, H3

Electronic and magnetic properties of LuFe2O4 — •Karsten Kuepper1, Michael Raekers2, Christian Taubitz2, Manuel Prinz2, Christine Derks2, Manfred Neumann2, Andrei V. Postnikov3, Frank M. F. de Groot4, Cinthia Piamonteze5, Dharmalingam Prabhakaran6, and Stephen J. Blundell61Institut für Festkörperphysik, Universität Ulm, Albert-Einstein-Allee 11, D-89081 Ulm, Germany — 2Fachbereich Physik, Universität Osnabrück, Barbarastr. 7, 49069 Osnabrück, Germany — 3LPMD, Paul Verlaine University and Institute Jean Barriol, Metz, France — 4Department of Inorganic Chemistry and Catalysis, Utrecht University, Sorbonnelaan 16, 3584 CA Utrecht, Netherlands — 5Swiss Light Source, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland — 6Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, United Kingdom

LuFe2O4 is a compound showing fascinating magneto electric coupling via charge ordering. Electronic and magnetic properties of the charge ordered phase of LuFe2O4 are investigated by means of x-ray spectroscopic and theoretical electronic structure approaches [1]. We identified the electronic states of the valence band by means of valence band XPS-, and XES-spectroscopies, and GGA+U first principles calculations. Moreover, by applying XMCD, we are able to identify the spin ground state of LuFe2O4 in the charge ordered phase to be a 2:1 ferrimagnetic configuration, ruling out a frustrated magnetic state.
[1] K. Kuepper et al., Phys. Rev. B, Rapid Commun., in press.

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