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Title
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Structure and microstructure of epitaxial films
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Author
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Abstract
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| Thin films of SrFeO3-x (0 less than or equal to x less than or equal to 0.5) (SFO) grown on a (LaAlO3)(0.3) (SrAl0.5Ta0.5O3)(0.7) (LSAT) substrate by Pulsed laser deposition have been structurally investigated by electron diffraction and high resolution transmission electron microscopy for different post-deposition oxygen treatments. During the deposition and post-growth oxidation, the oxygen-reduced SFO films accept extra oxygen along the tetrahedral layers to minimize the elastic strain energy. The oxidation process stops at a concentration SFO2.875 and/or SFO2.75 because a zero misfit with the LSAT substrate is reached. A possible growth mechanism and phase transition mechanism are suggested. The non-oxidized films exhibit twin boundaries having a local perovskite-type structure with a nominal composition close to SFO3. |
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Language
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English
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Source (journal)
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Philosophical magazine. - -, 2003, currens
Philosophical magazine. - London, 1945 - 1977
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Publication
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2004
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ISSN
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1478-6435
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DOI
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10.1080/14786430412331313187
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Volume/pages
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84
:36
(2004)
, p. 3825-3841
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ISI
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000225854700001
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Full text (Publisher's DOI)
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