No abstract

No abstract

No abstract

No abstract

Zn-doped YBa 2 Cu 3 O 61d (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 YBa 2 (Cu 12x Zn x ) 3 O 61d . There is a nearly linear relationship between the added Zn content in the liquid and the analyzed Zn content in the liquid/in the crystal. When the added Zn content C l was 1.086 at. %, decreasing of growth temperature led to increasing growth rate. However, growth temperature had no obvious effect on the doped Zn content in the crystal C s , the Zn content in the flux C l , and the effective distribution ratio of k 0 . In addition, growth spirals on the grown crystal surface were observed by atomic force microscopy (AFM). X-ray Laue pattern and RBS measurements are indicative of good crystallinity of YBa 2 (Cu 12x Zn x ) 3 O 61d . 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.