Dimensional crossover of correlated anion disorder in oxynitride perovskites

Hannah Johnston, Ashley P. Black, Paula Kayser, Judith Oró-Solé, David A. Keen, Amparo Fuertes, J. Paul Attfield

    Research output: Contribution to journalArticleResearchpeer-review

    9 Citations (Scopus)


    © 2018 The Royal Society of Chemistry. A simple crossover from two-dimensional to three-dimensional correlated disorder of O and N atoms on a cubic lattice has been discovered within the Ba1-xSrxTaO2N series of perovskite oxynitrides. The crossover is driven by lattice expansion as x decreases, and provides a rapid increase in entropy due to a change from subextensive to extensive configurational entropy regimes.
    Original languageEnglish
    Pages (from-to)5245-5247
    JournalChemical Communications
    Issue number41
    Publication statusPublished - 1 Jan 2018


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