Epitaxially oriented YBa2Cu3O7−x thin films on 〈100〉 MgO prepared by metallo-organic decomposition

Abstract
Superconducting thin films of YBa2Cu3O7−x were prepared by metallo‐organic decomposition. Both ion channeling and x‐ray diffraction measurements showed that the oxide films grown on 〈100〉 MgO are epitaxially oriented in structure. The minimum yield of metal components varied from 0.58 to 0.32 in channeling measurements with the analyzing beam at energies ranging from 4.5 to 1.0 MeV. All x‐ray diffraction lines corresponded to the (00l) reflections of the superconducting phase. The film exhibited complete superconductivity at 79–80 K with a transition width of 2.5 K.