Dresden 2009 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 40: Poster II: Bio- and Molecular Magnetism (1-9); Magnetic Coupling Phenomena/Exchange Bias (10-15); Magnetic Particlicles and Clusters (16-29); Micro and Nanostructured Magnetic Materials (30-51); Multiferroics (52-64); Spin Injection in Heterostructures (65-67); Spin-Dyn./Spin-Torque (68-93); Spindependent Transport (94-108)

MA 40.64: Poster

Freitag, 27. März 2009, 11:00–14:00, P1A

Structural investigations of complex perovskite oxide films with X-ray diffraction — •Ksenia Boldyreva, Diana Rata, Andreas Herklotz, Orkidia Bilani-Zeneli, Ruben Hühne, Ludwig Schultz, and Kathrin Dörr — IFW Dresden, Postfach 270116, 01171 Dresden, Deutschland

The electronic and magnetic properties of many complex oxides are highly sensitive to external parameters which include mechanical deformation or strain. Thus, X-ray diffraction methods such as reciprocal space mapping are powerful and indispensable for the characterization of thin films, particularly for evaluating the in-plane strain state. The direct influence of strain on the magnetization of epitaxial La_1−xSr_xMnO₃ (LSMO) films has been studied utilizing piezoelectric PMN-PT substrates [1]. On the other hand, La_1−xSr_xCoO₃ (LSCO) films also reveal large strain-induced changes of the magnetization and the electrical conductivity [2]. Since the in-plane lattice parameter of the piezoelectric substrate, PMN-PT, of ∼4.02 Å  is larger than that of most correlated oxides, LaSc_1−xAl_xO₃ (LSAO) has been explored as a buffer layer showing a lattice parameter that is tunable by the composition x. The lattice structure of (i) LSAO buffers depending on the composition and (ii) of magnetic films (LSMO, LSCO) grown in various strain states will be discussed.
C. Thiele et al., PRB 75, 054408 (2007); [2] A. D. Rata et al., PRL 100, 076401 (2008).