ZN DOPING IN YBCO SINGLE-CRYSTAL BY THE SOLUTE-RICH LIQUID-CRYSTAL PULLING METHOD

Zn-doped YBa2Cu3O6+delta (YBCO) single crystals were fabricated by the solute-rich liquid-crystal pulling (SRL-CP) method. The Zn content of x ranged from 0.0035-0.029 and almost uniformly distributed in YBa2(C u1-xZnx)(3)O-6+delta. There is a nearly linear relationship between th e added Zn content in the liquid and the analyzed Zn content in the li quid/in the crystal. When the added Zn content C-l was 1.086 at. %, de creasing of growth temperature led to increasing growth rate. However, growth temperature had no obvious effect on the doped Zn content in t he crystal C-s, the Zn content in the flux C-l, and the effective dist ribution ratio of k'. In addition, growth spirals on the grown crystal surface were observed by atomic force microscopy (AFM). X-ray Laue pa ttern and RES measurements are indicative of good crystallinity of YBa 2(Cu1-xZnx)(3)O-6+delta. Critical temperatures of T-c changed from 89 to 57 K when the Zn content x ranged 0.0035 to 0.029 after appropriate oxygenation.