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    Temperature-Dependent Structural Behaviour of Samarium Cobalt Oxide

    258723.pdf (546.5Kb)
    Access Status
    Open access
    Authors
    Rowles, Matthew
    Wang, C.
    Chen, K.
    Li, N.
    Date
    2017
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Rowles, M. and Wang, C. and Chen, K. and Li, N. 2017. Temperature-Dependent Structural Behaviour of Samarium Cobalt Oxide. Powder Diffraction. 32 (S2): S38-S42.
    Source Title
    Powder Diffraction
    DOI
    10.1017/s0885715617000872
    ISSN
    0885-7156
    School
    School of Electrical Engineering, Computing and Mathematical Science (EECMS)
    Remarks

    This article has been published in a revised form in Powder Diffraction http://doi.org/10.1017/s088571561700087. This version is free to view and download for private research and study only. Not for re-distribution, re-sale or use in derivative works

    URI
    http://hdl.handle.net/20.500.11937/60300
    Collection
    • Curtin Research Publications
    Abstract

    The crystal structure and thermal expansion of the perovskite samarium cobalt oxide (SmCoO3) have been determined over the temperature range 295–1245 K by Rietveld analysis of X-ray powder diffraction data. Polycrystalline samples were prepared by a sol–gel synthesis route followed by high-temperature calcination in air. SmCoO3 is orthorhombic (Pnma) at all temperatures and is isostructural with GdFeO3. The structure was refined as a distortion mode of a parent structure. The thermal expansion was found to be non-linear and anisotropic, with maximum average linear thermal expansion coefficients of 34.0(3) × 10−6, 24.05(17) × 10−6, and 24.10(18) × 10−6 K−1 along the a-, b-, and c-axes, respectively, between 814 and 875 K.

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