Segregation phenomena in thin films of BaTiO3
| Autor: | M. Siegert, Wolfgang Speier, S. Hoffmann, Rainer Waser, Uwe Breuer, Krzysztof Szot |
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| Rok vydání: | 2001 |
| Předmět: |
Materials science
Morphology (linguistics) Atmospheric temperature range Condensed Matter Physics Microanalysis Electronic Optical and Magnetic Materials Crystallography Carbon film X-ray photoelectron spectroscopy Control and Systems Engineering Chemical physics Materials Chemistry Ceramics and Composites sense organs Surface layer Electrical and Electronic Engineering Thin film Perovskite (structure) |
| Zdroj: | Integrated Ferroelectrics. 33:303-310 |
| ISSN: | 1607-8489 1058-4587 |
| DOI: | 10.1080/10584580108222312 |
| Popis: | 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°C-1000°C 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. |
| Databáze: | OpenAIRE |
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