Journal Article

PreJuSER-29426

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Segregation phenomena in thin films of BaTio3

Szot, K.FZJ* ; Hoffmann, S.FZJ* ; Speier, W.FZJ* ; Breuer, U.FZJ* ; Siegert, M.FZJ* ; Waser, R.FZJ*

2001
Taylor & Francis London [u.a.]

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Please use a persistent id in citations: doi:10.1080/10584580108222312

Abstract: 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.

Keyword(s): J ; thin films (auto) ; surface layer (auto) ; surface segregation (auto) ; surface morphology (auto) ; atomic force microscopy (auto)

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Zentralabteilung für Chemische Analysen (ZCH)
2. Elektrokeramische Materialien (IFF-EKM)

Research Program(s):

1. Entwicklung analytischer Verfahren (62.10.1)
2. Festkörperforschung für die Informationstechnik (23.42.0)

Appears in the scientific report 2001

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