The relationship between open volume defects and deposition conditions of superconducting thin-film YBa2Cu3O7-x

The relationship between the open volume defects and the deposition conditions of superconducting thin-film YBa2Cu3O7-x was studied by the position lifetime technique. Using a low-energy pulsed positron system, positron lifetime as a function of implantation energy was measured on epitaxial superconducting thin-film YBa2Cu3O7-x deposited on yttrium stabilized cubic zirconia substrates (YSZ) with pulsed laser deposition in a partial pressure of air under different conditions. The results show that the type of open volume defect is independent of deposition conditions such as the substrate temperature, T-s, and the air pressure, p(a). The defect concentration increases with decreasing T-s and increasing p(a).