Ginzburg-Landau theory of an incommensurate-to-commensurate transition in barium sodium niobate

S. Mori, Yasumasa Koyama, Y. Uesu

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    Features of an incommensurate-to-commensurate transition in barium sodium niobate, which is obtained in a cooling process from a tetragonal phase, have been theoretically examined on the basis of the Ginzburg-Landau theory. The present theory which takes into account the contribution of higher-order distortion waves produced from higher-order harmonics via the umklapp process, well reproduces an experimentally obtained change in an incommensurability δ on cooling. The theory also predicts both a discommensuration with a phase slip of 2π/4 and the incommensurate-to-commensurate transition.

    Original languageEnglish
    Pages (from-to)621-624
    Number of pages4
    JournalPhysical Review B
    Volume49
    Issue number1
    DOIs
    Publication statusPublished - 1994

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    niobates
    Barium
    barium
    Sodium
    sodium
    Umklapp process
    Cooling
    cooling
    slip
    harmonics
    sodium niobate

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Ginzburg-Landau theory of an incommensurate-to-commensurate transition in barium sodium niobate. / Mori, S.; Koyama, Yasumasa; Uesu, Y.

    In: Physical Review B, Vol. 49, No. 1, 1994, p. 621-624.

    Research output: Contribution to journalArticle

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