Dresden 2009 – scientific programme

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DS: Fachverband Dünne Schichten

DS 3: Layer Deposition Processes

DS 3.6: Talk

Monday, March 23, 2009, 17:00–17:15, GER 37

Preparation of thin biaxial strained functional oxides and multilayers — •Sascha Trommler, Thomas Freudenberg, Ruben Hühne, Bernhard Holzapfel, and Ludwig Schultz — IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany

Functional oxides with a perovskite structure as well as structurally related compounds have attracted great interest within the last years. It was shown, that novel electronic phases can be formed at interfaces of epitaxial grown oxides as well as that the biaxial strain induced by the lattice mismatch may significantly affect the physical properties in these materials. A major 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 real time RHEED investigations to prepare heterostructures on single terminated substrates using layer-by-layer growth. Results on the deposition of atomically flat La_2−xBa_xCuO₄, LaAlO₃ and La_1−xSr_xCoO₃ layers on different substrates will be presented and discussed together with their structural and physical properties. Furthermore, the preparation of complex multilayers will be exemplarily shown for the LaCoO₃|SrTiO₃ system.