Metallurgical and Materials Transactions A

, Volume 43, Issue 5, pp 1429–1433 | Cite as

Temperature Dependence of Diffuse Scattering in PZN

Symposium: Neutron and X-Ray Studies of Advanced Materials IV

Abstract

Structural disorder seems to relate to the useful physical properties of ferroelectrics and relaxors. One such material is PZN, \(\hbox{PbZn}_{1/3}\hbox{Nb}_{2/3}\hbox{O}_{3}.\) To explore what aspects of the disorder are specific to the polarized state, the temperature dependence of diffuse scattering in PZN has been investigated. The data were collected using both neutron and X-ray single crystal experiments in a range of temperatures from 50 K to 500 K (−223 °C to 227 °C). It has been found that some features, like the diffuse scattering from the B-site ordering, remain unchanged with change of temperature in terms of both intensity and peak shape. However, other diffuse scattering features evolve with T, for example the size effect scattering around the Bragg peaks. The size-effect becomes less pronounced with increasing temperature, with the diffuse scattering becoming more symmetric around the Bragg peaks. The diffuse rods caused by the planar domains change only slightly with temperature. This finding indicates that the planar domains persist into the paraelectric state but that the correlation between lead displacement and the average separation of adjacent lead atoms becomes weaker, suggesting that this size effect may be crucial to the ferroelectric properties.

Notes

Acknowledgments

We acknowledge the Australian Research Council for support through its Discovery Projects program and the Australian Institute for Nuclear Science and Engineering for their financial support. Dr. J.S. Forrester kindly supplied the PZN crystal. D.J.G. thanks Dr. A.P. Heerdegen and Prof. T.R. Welberry of the Research School of Chemistry at the Australian National University for their advice and assistance.

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2011

Authors and Affiliations

  • R. E. Whitfield
    • 1
  • A. J. Studer
    • 3
  • D. J. Goossens
    • 1
    • 2
  1. 1.Research School of Physics and EngineeringAustralian National UniversityCanberraAustralia
  2. 2.Research School of ChemistryAustralian National UniversityCanberraAustralia
  3. 3.Bragg Institute, Australian Nuclear Science and Technology OrganizationSydneyAustralia

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