Ordering in (La,Sr)(Al,Ta)O3 substrates
Publication Type | Journal Article
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Authors | |
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DOI |
10.1557/JMR.2003.0233
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Abstract |
(La, Sr)(Al, Ta)O3 (LSAT) has recently received increased attention as a substrate for the deposition of various oxide films. LSAT is usually considered as having a perovskite structure. However, the exact atomic structure of LSAT is not yet well known and has received little attention up to now. In this paper, a series of studies using x-ray diffraction, transmission electron microscopy, and energy dispersive spectrometry were conducted to determine the atomic structure of LSAT. It was found that LSAT consists of two types of domains: one with a simple cubic perovskite structure (disordered with a = 0.3868 nm) and the other with a face-centered-cubic structure (ordered with a = 0.773 nm). Computer image simulation of high-resolution lattice images suggests that the ordered structure is due to ordering of the Al and Ta ions.
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Notes |
cited By 16
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Journal |
Journal of Materials Research
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Volume |
18
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Year of Publication |
2003
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Number |
7
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Pagination |
1698-1704
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Publisher |
Materials Research Society
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ISSN Number |
08842914
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Keywords |
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Research Areas | |
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