We report on the superconducting properties of epitaxial thin films Y1-xCaxBa2Cu3O7-ywith 0 ≤ x ≤ 0.2, grown on SrTiO3(001) by Pulsed Laser Deposition (PLD) technique. The partial substitution of Ca2+at the Y3+site in YBCO leads to a monotonic decrease of the zero resistance critical temperature, Tc. The oxygen stoichiometry is varied by means of post-deposition thermal treatment varying the oxygen partial pressure. The dependence of Tcon annealing oxygen pressure can be attributed to an overdoping effect and/or to a cation disorder. © 2005 IEEE.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering