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Title
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Cation ordering in [(Tl, **M**)O] layers of "1202"-based cuprates : similarity to ordering in fcc-based alloys
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Author
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Abstract
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| ''1201'' Tl-based substituted cuprates of the type (Tl1-xMx) Sr2CuO5 have been synthesized for M = Nb, Ta, or W. These materials do not superconduct due to a statistical distribution of some of the M for Cu. The remarkable feature of these materials is the ordering observed between Tl and M in the (Tl1-xMx-epsilon)O plane. The type of ordering depends on the composition and shows remarkable similarities with the ordering in Ni-Mo or other so-called 1 1/2 0 type fcc-based alloys or with the ordering in rocksalt oxides TiOx. The short-range order, for M = W, can be readily interpreted in terms of a mixing of nano-clusters with two different compositions. These observations of two-dimensional ordering confirm recent ideas about ordering in three-dimensional fcc-based alloys. |
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Language
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English
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Source (journal)
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Journal of solid state chemistry. - London
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Publication
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London
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1997
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ISSN
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0022-4596
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DOI
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10.1006/JSSC.1997.7418
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Volume/pages
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132
(1997)
, p. 113-122
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ISI
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A1997XY68900015
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Full text (Publisher's DOI)
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