Superconductor thin films : In situ X-ray study on the reaction of hydrogen with epitaxial YBa2Cu3O7 Layers


  • Support by the Bundesminister für Forschung and Technologie is gratefully acknowledged by W. P., R. B. and R. S. [AMC 153]


The critical temperatures (Tcs) of superconducting oxocuprates are known to be correlated with the hole concentration. This can be in turn influenced by isomorphic substitution of cationic lattice constituents, the variation of the oxygen stoichiometry via thermal processes, or, as reported here, by reaction with hydrogen as the insertation of H should be equivalent to the extinction of a corresponding amount of holes. The reaction with hydrogen has been examined using in situ X-ray diffraction.