Dresden 2011 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 63: Poster II (Surface Magnetism/ Magnetic Imaging/ Topological Insulators/ Spin Structures and Magnetic Phase Transitions/ Graphene/ Magnetic Thin Films/ Magnetic Semiconductors/ Magnetic Half-metals and Oxides/ Spin-dependent Transport/ Spin Excitations and Spin Torque/ Spin Injection and Spin Currents in Heterostructures/ Spintronics/ Magnetic Storage and Applications)
MA 63.40: Poster
Freitag, 18. März 2011, 11:00–14:00, P2
(contribution withdrawn) Electronic and magnetic structure of (Ca,Sr)RuO3 thin films — •Andrea Assmann1,2, Stephan Uebe1,2, Michael Merz1, Markus Wissinger1,2, Hilbert von Löhneysen1,3, Dirk Fuchs1, Peter Nagel1, and Stefan Schuppler1 — 1Karlsruhe Institute of Technology, Institut für Festkörperphysik, Germany — 2Karlsruhe Institute of Technology, Fakultät für Physik, Germany — 3Karlsruhe Institute of Technology, Physikalisches Institut, Germany
The 4d transition metal oxide (Ca,Sr)RuO3 exhibits ferromagnetic order in the doping range 0.4 ≤ x ≤ 1 while it is a paramagnetic metal for x < 0.4. Since (Ca,Sr)RuO3 remains essentially isostructural and has a similar electronic configuration throughout the doping series, the differences in the magnetic properties might be attributed to chemical pressure effects. To verify a possible dependence of direction and/or magnitude of the magnetic moments on pressure, (Ca,Sr)RuO3 films were deposited on different substrates (LSAT, STO, DyScO3=DSO). The magnetic and electronic structure of the samples was studied by soft x-ray absorption and magnetic circular dichroism at the Ru M2,3 and O K edges. In addition, depth-dependent information on element-specific core levels was obtained by varying the photon energy in soft x-ray photoemission spectroscopy. Various implications will be discussed.