Structural phase transitions between 700 and 850°C in SrZrO3 studied by Raman spectroscopy

Hirotaka Fujimori, Masato Kakihana, Koji Ioku, Seishi Goto, Masahiro Yoshimura

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The Pnma-Imma-I4/mcm phase transitions of SrZrO3 have been successfully observed by measuring the variation of energies of phonon modes as a function of temperature. The squares of phonon mode frequencies, ω02, exhibit a linear relation with temperature, T, on both sides of the phase transitions. An unusual value of -7 of the ratio of ∂(ω02)/∂T below and above the phase transition temperature between Pnma and Imma, was observed compared to the value of - 2 expected from the mean field theory. The result can be accounted for in terms of coupling between an optical mode and strain.

Original languageEnglish
Pages (from-to)189-192
Number of pages4
JournalJournal of the Ceramic Society of Japan
Volume112
Issue number1304
DOIs
Publication statusPublished - 2004 Apr
Externally publishedYes

Keywords

  • High temperature
  • Perovskite
  • Phase transition
  • Phonon
  • Raman scattering

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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