Berlin 2012 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 20: Poster I - Biomagnetism, FePt Nanoparticles, Magnetic Particles/Clusters, Magnetic Materials, Magnetic Semiconductors, Half-metals/Oxides, Multiferroics, Topological Insulators, Spin structures/Phase transitions, Electron theory/Computational micromagnetics, Magnetic coupling phenomena/Exchange bias, Spin-dependent transport, Spin injection/spin currents, Magnetization/Demagnetization dynamics, Magnetic measurement techniques
MA 20.36: Poster
Dienstag, 27. März 2012, 12:15–15:15, Poster A
Electronic and magnetic properties of LuFe2O4 — •Christine Derks1, Karsten Kuepper2, Manfred Neumann1, Dharmalingam Prabhakaran3, Stephen J. Blundell3, Andrei Rogalev4, and Fabrice Wilhelm4 — 1Fachbereich Physik, Universität Osnabrück, Germany — 2Institut für Festkörperphysik, Universität Ulm, Germany — 3Department of Physics, University of Oxford, United Kingdom — 4ESRF, Grenoble, France
LuFe2O4 is a compound showing fascinating magneto electric coupling via charge ordering. Electronic and magnetic properties of the charge ordered phase of LuFe2O4 have been investigated by means of x-ray spectroscopic and theoretical electronic structure approaches [1]. Using hard x-ray radiation of the ESRF ID12 circular polarisation beamline, Fe K-edge and Lu L-edge spectra have been detected. The Fe K-edge spectra will be discussed in comparison to the former Fe L-edge spectra. The Lu L-edge spectra show very interesting XMCD signals from which a small magnetic moment could be deduced.
[1]Kuepper et al. Phys. Rev. B, Vol. 80, 22, 220409