%0 Journal Article
%A Johnston, Hannah
%A Black, Ashley
%A Kayser González, Paula
%A Oró-Solé, Judith
%A Keen, David
%A Fuertes, Amparo
%A Attfield, Paul
%T Dimensional crossover of correlated anion disorder in oxynitride perovskites
%D 2018
%@ 1364-548X
%U https://hdl.handle.net/20.500.14352/92803
%X 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.
%~