INSITU GROWTH OF Y1BA2CU3O7-X SUPERCONDUCTING THIN-FILMS USING A PULSED NEODYMIUM YTTRIUM-ALUMINUM-GARNET LASER WITH CO2-LASER HEATED SUBSTRATES

Abstract

By replacing the resistive heater with a CO2 laser to heat the substrates together with concentered oxygen stream blowing onto the substrate during deposition, high quality Y1Ba2Cu3O7-x thin films with nearly perfect c-axis orientation and T(c0) = 87 K were grown in situ without subsequent slow cooling in oxygen atmosphere or any further heat treatment. The rapid quenching, from typically 600-degrees-C to room temperature in less than 50 s of the as-deposited films, excludes the possibility of further oxygen incorporation during the cooling process and indicates that the in situ growth may have completed during deposition under proper deposition conditions.