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A TEM study of ordering in the perovskite, Pb(Sc1/2Ta1/2)O3

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Abstract

Ordering behaviour and the factors which influence the ordering have been studied in both single crystals and hot-pressed ceramics of Pb(Sc1/2Ta1/2)O3 using TEM techniques, including low-temperature microscopy. The characteristics of the structurally-ordered domains are described and also the observation by electron diffraction of new superlattice reflections and diffuse scattering in both the paraelectric and ferroelectric phases. The superlattice reflections are interpreted in terms of Pb2+ cation displacements. The non-interaction of ordered domains and ferroelectric domains is explained within this model.

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Authors and Affiliations

  1. Department of Physics, University of Essex, CO4 3SQ, Colchester, UK

    C. A. Randall & D. J. Barber

  2. Allen Clark Research Centre, NN12 8EQ, Towcester, UK

    R. W. Whatmore

  3. Clarendon Laboratory, OX1 3PU, Oxford, UK

    P. Groves

Authors
  1. C. A. Randall
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  2. D. J. Barber
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  3. R. W. Whatmore
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  4. P. Groves
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Randall, C.A., Barber, D.J., Whatmore, R.W. et al. A TEM study of ordering in the perovskite, Pb(Sc1/2Ta1/2)O3 . J Mater Sci 21, 4456–4462 (1986). https://doi.org/10.1007/BF01106571

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  • DOI: https://doi.org/10.1007/BF01106571

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