Pressure-induced phase transitions of hexagonal perovskite-like oxides

Tomoya Aoba, Taneli Tiittanen, Hisayuki Suematsu, Maarit Karppinen*

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    5 Citations (Scopus)

    Abstract

    We have stabilized two new cubic (3C structured) A(2)B'B '' O-6-type double-perovskite phases, Ba2CoSbO6 and Ba2ZnTeO6, by means of a high-pressure heat-treatment of corresponding hexagonal (6H and 12R structured, respectively) non-perovskite phases at 4 GPa and 1000 degrees C. Similar treatments on hexagonal Ba2TiMnO6 (12R) and Ba2NiTeO6 (12R) phases did not yield the 3C double-perovskite structure but converted the 12R structure to the 6H structure. The pressure-induced phase conversion in each A(2)B'B '' O-6 system apparently goes from the 12R structure towards the 6H and 3C structures with increasing pressure, where the pressure ranges required most likely depend (among other possible factors) on the tolerance factor for the particular combination of A, B' and B ''. We foresee that yet a number of novel B-site ordered double-perovskite compounds are to be discovered through the high-pressure high temperature treatment. (C) 2015 Elsevier Inc. All rights reserved.

    Original languageEnglish
    Pages (from-to)492-496
    Number of pages5
    JournalJournal of Solid State Chemistry
    Volume233
    DOIs
    Publication statusPublished - 2016
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Double-perovskite
    • Complex oxide
    • High-pressure synthesis
    • Tolerance parameter
    • MAGNETIC-PROPERTIES
    • CRYSTAL-STRUCTURE
    • 3-DIMENSIONAL VISUALIZATION
    • ANODE MATERIALS
    • FUEL-CELLS
    • ORDER
    • MAGNETORESISTANCE
    • SR2FEMOO6
    • VALENCE
    • FE

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