%0 Nanopartikel unedler Metalle (Mg0, Al0, Gd0, Sm0) %A Szot, K. %E Hoffmann, S. %E Speier, W. %E Breuer, U. %E Siegert, M. %E Waser, R. %I Taylor & Francis %D 2001 %C London u.a. %G Record converted from VDB: 12.11.2012 %B Integrated Ferroelectrics %@ 1058-4587 %T Segregation phenomena in thin films of BaTio3 %X The near-surface region in perovskite bulk crystals is known to be subject to segregation processes at elevated temperatures which can lead to the formation of non-perovskite phases. We have addressed the question whether analogue phenomena may occur in thin films, Thin films of BaTiO3 prepared by different methods (PLD, CSD) and heat-treated in the temperature range of 700 degreesC-1000 degreesC are characterised by surface analytical methods and microanalysis (AFM, SIMS, XPS). Our studies reveals dramatic changes in the surface morphology and in-depth elemental distribution suggesting a chemical restructuring comparable to the effects known for single crystalline BaTiO3. Possible driving forces for the observed segregation phenomena are discussed taking into account specific properties of the thin films.