Relationship between oxygen stoichiometry and crystal structure in YBa2Cu3O6.5+x precursors to high-Tc superconducting materials |
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| Institution: | 1. Laboratoire de Catalyse Institute for Studies in Interface Sciences (ISIS) Facultés Universitaires Notre-Dame de la Paix 61 Rue de Bruxelles, B-5000 Namur, Belgium;2. Laboratoire de Chimie Théorique Appliquée Institute for Studies in Interface Sciences (ISIS) Facultés Universitaires Notre-Dame de la Paix 61 Rue de Bruxelles, B-5000 Namur, Belgium;3. Laboratoire de Physique Mathématique et de Physique du Solide Institute for Studies in Interface Sciences (ISIS) Facultés Universitaires Notre-Dame de la Paix 61 Rue de Bruxelles, B-5000 Namur, Belgium |
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| Abstract: | Possible mechanisms for the oxygen intercalation in the ternary mixed-Cu-valence YBa2Cu3O6.5+x oxide are considered, which account for the observed cell symmetry transformation driven by the oxygen concentration. These mechanisms are consistent with the formation of both single-and double-cell superstructures of ordered oxygen vacancies that have been encountered in crystallographic investigations of the high-Tc superconductor YBa2Cu3O≈7. |
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