(Ca 0.5 Mn 0.5 ) 2 MnTeO 6 - An Anomalously Stable High-Pressure Double Perovskite

High pressure high temperature treatments of the composition CaMnMnTeO are found to yield only an A BB'O -type double perovskite (Ca Mn ) MnTeO , rather than a AA'BB'O double double perovskite with A- and B- site cation order as found in analogs CaMnMnReO and CaMnMnWO with similar cat...

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Bibliographic Details
Published in:Chemistry, an Asian journal an Asian journal, 2024-07, Vol.19 (14), p.e202400280
Main Authors: Almadhi, Azizah, Ji, Kunlang, Injac, Sean D, Ritter, Clemens, Attfield, J Paul
Format: Article
Language:English
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Summary:High pressure high temperature treatments of the composition CaMnMnTeO are found to yield only an A BB'O -type double perovskite (Ca Mn ) MnTeO , rather than a AA'BB'O double double perovskite with A- and B- site cation order as found in analogs CaMnMnReO and CaMnMnWO with similar cation sizes. Double perovskite (Ca Mn ) MnTeO adopts a monoclinic structure in space group P2 /n with a framework of highly tilted MnO and TeO octahedra enclosing disordered Ca and Mn cations. Magnetic measurements show that (Ca Mn ) MnTeO is a highly frustrated spin glass with a freezing transition at 5 K, and no long-range spin order is apparent by neutron diffraction at 1.6 K.
ISSN:1861-4728
1861-471X
DOI:10.1002/asia.202400280