REPRODUCIBLE GROWTH OF HIGHLY CRYSTALLINE YBA2CU3O7 THIN-FILMS ON SRTIO3 BY SCANNING PULSED-LASER DEPOSITION

YBa2Cu3O7 (YBCO) thin films were grown on SrTiO3 substrates using a pu lsed laser deposition system. The laser beam was scanned over the targ et in such a way to obtain a reproducible method of composition contro l at the substrate. In total, 17 films were grown under optimal condit ions; they exhibited mean transition temperatures of 89.7 +/- 0.4 K an d mean (005) rocking curve widths of 0.07 degrees +/- 0.02 degrees. Th e narrowest (005) rocking curve width was measured to be 0.037 degrees . Both the rocking curve line shapes and the dependence of transition temperature on rocking curve width suggest the films have single-cryst al-like structure. (C) 1997 American Institute of Physics.