YBa₂Cu₃O_7-δ超伝導薄膜の酸素欠損と陽イオン秩序

抄録

Crystal structure and superconductivity of YBa₂Cu₃O_7-δ thin films were investigated as functions of oxygen contents and growth temperatures. An effective method for the quantita-tive determination of oxygen content from X-ray diffraction intensity ratio was established through systematic studies on the structural change of the oxygen deficient films. Dependence of cation disorder and T_c on growth temperature, as well as post-annealing temperature has also been obtained. The results suggest an intrinsic relation existing between structure and superconductivity.