PULSED-LASER DEPOSITION OF DIAMOND-LIKE CARBON COATING ON YBA2CU3O7 HIGH-T-C SUPERCONDUCTOR FILMS

The possibility of fabrication of diamond-like coating on high-ir, sup erconductors is investigated. Carbon thin films were deposited on sing le-crystal YBa2Cu3O7 film substrates by pulsed-laser sputtering of gra phite targets. Deposition at room temperature yields diamond-like film s with high optical transmission, high resistivity, and good adhesion to unpretreated substrates. Degradation of superconducting properties or deterioration of mechanical characteristics of YBa2Cu3O7 films was not observed after carbon deposition and subsequent low-temperature th ermocycling. The water-protective properties of these diamond-like coa tings were investigated.