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On short range ordering in the perovskite lead magnesium niobate

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Abstract

The structural ordering characteristics of lead magnesium niobate (PMN) and solid solutions (PMN-PT) of PMN with lead titanate have been investigated using transmission electron microscopy (TEM). It is proposed that short range, non-stoichiometric 1∶1 ordering of the Mg and Nb cations on an F-centred superlattice generates space charges which dominate the kinetics of the ordering process and inhibit the development of long-range order. Furthermore, it is demonstrated that by introducing off-valent La3+ ions on to the A-site sublattice, the local charges can be at least partially-compensated and an increase in the extent of structural ordering is consequently observed.

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Authors and Affiliations

  1. Department of Physics, University of Essex, Wivenhoe Park, Colchester, Essex, UK

    A. D. Hilton & D. J. Barber

  2. Materials Research Laboratory, Pennsylvania State University, 16802, PA, USA

    C. A. Randall & T. R. Shrout

Authors
  1. A. D. Hilton
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  2. D. J. Barber
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  3. C. A. Randall
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  4. T. R. Shrout
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Hilton, A.D., Barber, D.J., Randall, C.A. et al. On short range ordering in the perovskite lead magnesium niobate. J Mater Sci 25, 3461–3466 (1990). https://doi.org/10.1007/BF00575371

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  • DOI: https://doi.org/10.1007/BF00575371

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