Berlin 2008 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 17: Poster: Trends in Ion Beam Technology, Magnetism in Thin Films, Functional Oxides, High-k Dielectric Materials, Semiconductor Nanophotonics, Nanoengineered Thin Films, Layer Deposition Processes, Layer Growth, Layer Properties, Thin Film Characterisation, Metal and Amorphous Layers, Application of Thin Films

DS 17.57: Poster

Dienstag, 26. Februar 2008, 09:30–13:30, Poster A

Preparation of thin biaxial strained functional oxides — •Sascha Trommler, Thomas Freudenberg, Ruben Hühne, Bernhard Holzapfel, and Ludwig Schultz — IFW-Dresden, Germany

In the last years functional oxides with a perovskite structure as well as structurally related compounds have attracted great interest. It had been shown, that between interfaces of such epitaxial oxides novel electronic structures can be formed or that the biaxial strain induced by the lattice mismatch may affect the physical properties significantly in these materials. A main prerequisite to study these effects is the controlled growth of epitaxial heterostructures on an atomic level in order to achieve smooth interfaces with a low density of defects. Therefore, pulsed laser deposition was used in combination with in-situ RHEED observation to prepare such heterostructures on single terminated atomically flat substrates. Results on the layer-by-layer growth of different functional oxides as SrRuO₃, La_2−xBa_xCuO₄ and of LaCoO₃ will be presented and discussed together with their structural and physical properties.