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 17.46: Poster
Dienstag, 26. Februar 2008, 09:30–13:30, Poster A
Pulsed laser deposited La0.7Ce0.3MnO3 thin films: Dependence of properties on growth parameters — •Robert Werner, Victor Leca, Christoph Back, Reinhold Kleiner, and Dieter Koelle — Universität Tübingen, Physikalisches Institut – Experimentalphysik II, 72076 Tübingen, Germany
La0.7Ce0.3MnO3 thin films were grown epitaxially by pulsed laser deposition on (001) SrTiO3 substrates.
The evolution of the growth front and the film thickness were monitored in-situ by means of high-pressure reflection high energy electron diffraction,
while the morphology and crystal structure were analyzed by atomic force microscopy and X-ray diffraction, respectively.
Furthermore, electrical transport and magnetic properties of the films were studied in the 5–300 K temperature range.
Single phase films could be obtained only for pO2>0.13mbar. With increasing pressure, the roughness increased. A roughness of one unit cell could only be obtained at a pressure around 3Pa. The evolution of the electric transport and magnetic properties with the level of strain (film thickness) will be discussed. Depending on the deposition parameters we got a transition temperature between 220-260 Kelvin.