Y-Ba-Cu-O superconducting thin films prepared by plasma-assisted flash evaporation

Abstract
Superconducting thin films of Y‐Ba‐Cu‐O oxide have been prepared on (100) MgO substrates by flash evaporation in oxygen plasma. The as‐grown films deposited at substrate temperatures from 385 to 550 °C show superconducting properties with a critical temperature Tc of about 90 K. Transmission electron diffraction indicates that a film deposited at below 430 °C has both amorphous and polycrystalline regions, and that a film at above 430 °C is polycrystalline.