Dip-coating of YBa2Cu3O7-delta and YBa2Cu3O7-delta-Ag films on polycrystalline rare-earth barium niobate substrates

Dip-coating and partial melting technique have been used to fabricate high quality superconducting YBa2Cu3O7 - delta and YBa2Cu3O7 - delta-Ag thick fi lms with T-c(0) = 92 K on polycrystalline REBa2NbO6 (RE = Pr, Nd, Sm, and E u) substrates. The superconducting films showed excellent adhesion to the R EBa2NbO6 substrate. The effect of Ag addition in YBa2Cu3O7 - delta on the c urrent density, microstructure, and crystal orientation of the superconduct ing films developed on the above substrates have been discussed in detail. Dip-coating technique was found to be one of the easiest method for obtaini ng good quality superconducting YBa2Cu3O7 - delta thick films with thicknes s as low as 3 mu m even on polycrystalline substrates.