Deposition of high T(c) superconductor thin films by pulsed laser ablation

Thin superconducting films of YBa2Cu3O7 and HoBa2Cu3O7 have been obtained by ablating material from high-Tc bulk superconductor ceramics onto a nearby substrate using focused excimer laser radiation. Subsequent annealing in O2 at elevated temperatures is necessary to achieve the superconducting phase. The resulting films exhibit initial drops in resistivity at the same temperature as the bulk pellets but broader transition widths give a lower overall Tc for the films. 5 references