Thermodynamics of oxygen ordering in YBa2Cu3Oz

L. T. Wille*, A. Berera, D. De Fontaine

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The ordering in the Cu-O basal plane of YBa2Cu3Oz is investigated as a function of oxygen content and temperature. A phase diagram is calculated by application of the cluster variation method to an asymmetric two-dimensional Ising model. The interaction parameters selected guarantee the stability of the experimentally observed double-cell structure around z=6.5. The transition temperatures at various oxygen partial pressures are in good agreement with experiment. The pair probabilities along the Cu-O chains show a plateau with varying oxygen concentration, not unlike the dependence of Tc on oxygen content.

Original languageEnglish
Pages (from-to)1065-1068
Number of pages4
JournalPhysical Review Letters
Issue number11
Publication statusPublished - 1988


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