Dimensional crossover of correlated anion disorder in oxynitride perovskites

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https://doi.org/10.1039/c8cc03462a

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2018

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Royal Society of Chemistry
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https://hdl.handle.net/20.500.14352/92803

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ohnston, Hannah, et al. «Dimensional Crossover of Correlated Anion Disorder in Oxynitride Perovskites». Chemical Communications, vol. 54, n.o 41, 2018, pp. 5245-47. https://doi.org/10.1039/C8CC03462A.

Abstract

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 Ba1xSrxTaO2N 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.

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23 Química

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