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Double Perovskites
In article number 2305219, Youwen Long, Runze Yu, and co‐workers report the high‐pressure synthesis of a Pb2CoMoO6 double perovskite oxide and unprecedently find antiferroelectricity‐induced negative thermal expansion during the antiferroelectric transition as well as the antiferroelectric phase itself in a wide temperature range across the room temperature.
Materials with negative thermal expansion (NTE) attract significant research attention owing to their unique physical properties and promising applications. Although ferroelectric phase transitions leading to NTE are widely investigated, information on antiferroelectricity‐induced NTE remains limited. In this study, single‐crystal and polycrystalline Pb2CoMoO6 samples are prepared at high pressure...