A study of structures and order parameters in antiferroelectric PbHfO 3 by synchrotron radiation

Hideshi Fujishita, Yuya Ishikawa, Akira Ogawaguchi, Kenichi Kato, Eiji Nishibori, Masaki Takata, Makoto Sakata

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We present structures of PbHfO3 between 100 and 525 K analyzed by a Rietveld method using synchrotron radiation. Spontaneous strain of a perovskite sublattice could be excellently expressed by a conventional phenomenological theory in a room-temperature antiferroelectric phase. Pb shifts along the a-axis and the square root of the spontaneous strain showed similar dependence on temperature as expected from the theory below 200 K, while one of the shifts showed a slight deviation at high temperature. Disordered arrangement of Pb atoms in the cubic phase was found as in the cubic phase of PbZrO 3, though the direction of the disorder in PbHfO3 was not so obvious as that in PbZrO3.

Original languageEnglish
Pages (from-to)2743-2747
Number of pages5
Journaljournal of the physical society of japan
Volume74
Issue number10
DOIs
Publication statusPublished - 2005 Oct 1
Externally publishedYes

Keywords

  • Antiferroelectrics
  • Order parameter
  • PbHfO
  • Phenomenological theory
  • Spontaneous strain
  • Structure

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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