Regensburg 2010 – wissenschaftliches Programm
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KR: Fachverband Kristallographie
KR 9: Multiferroics II (Joint Session of MA, DF, KR, DS)
KR 9.10: 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. Blundell6 — 1Institut 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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