• DOI:10.1080/00150190211175
• Corpus ID: 120655494

Temperature Dependence of Order Parameters in the Antiferroelectric Phases of Perovskite PbHfO 3

@article{Fujishita2002TemperatureDO,
  title={Temperature Dependence of Order Parameters in the Antiferroelectric Phases of Perovskite PbHfO 3},
  author={Hideshi Fujishita and Yuya Ishikawa},
  journal={Ferroelectrics},
  year={2002},
  volume={269},
  pages={135 - 140},
  url={https://api.semanticscholar.org/CorpusID:120655494}
}

• H. Fujishita, Y. Ishikawa
• Published 1 January 2002
• Materials Science, Physics
• Ferroelectrics

Powder X-ray diffraction experiments of the antiferroelectric PbHfO 3 were performed between 8K and 525K using a conventional X-ray generator and a synchrotron radiation. Antiferroelectric superlattice reflections and reflections at R-point appeared below 435K on heating. Reflections associated with a large cell volume appeared between 435K and 480K instead of the antiferroelectric reflection. The reflections at R-point remained in the intermediate phase. Lattice distortions and superlattice… 

Powder X-ray diffraction experiments of the antiferroelectric PbHfO 3 were performed between 8K and 525K using a conventional X-ray generator and a synchrotron radiation. Antiferroelectric superlattice reflections and reflections at R-point appeared below 435K on heating. Reflections associated with a large cell volume appeared between 435K and 480K instead of the antiferroelectric reflection. The reflections at R-point remained in the intermediate phase. Lattice distortions and superlattice-reflection intensities showed saturation below 60K. The temperature dependence of the lattice distortions could be fitted well by the dependencies obtained from a conventional and a quantum expansion of phenomenological theory in the low temperature phase. Superlattice-reflection intensities showed the similar dependence on temperature as that of the lattice distortions. Superlattice reflections, which appeared only in the intermediate phase, were indexed by the most plausible period of 5a p x5a p x8c p .