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 journalArticlepeer-review

    23 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

    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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