LARGE SINGLE-CRYSTALS OF YBA2CU3O7-DELTA SUPERCONDUCTORS FROM CHLORIDE FLUXES

被引:25
作者
BOSI, S
PUZZER, T
RUSSELL, GJ
TOWN, SL
TAYLOR, KNR
机构
[1] Univ of New South Wales
关键词
Ceramic Materials--Crystallization - Copper Oxide--Crystallization - Crystals--Growing - Heat Treatment--Annealing - Yttrium Compounds--Crystallization;
D O I
10.1007/BF00720274
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Large single crystals of yttrium barium cuprate superconductors were grown using a molten salt flux consisting of an equimolar mixture of NaCl and KCl. As produced, the crystals have a large oxygen deficiency corresponding to δ=0.5. However, they are orthorhombic and show superconducting behavior. Oxygen annealing effects are visible in the unit cell parameters and in an increased sharpness of the onset of the superconducting transition observed by a.c. susceptibility measurements. The resistive and magnetic behaviors are consistent with a range of oxygen deficiencies in the samples, even after oxygen annealing.
引用
收藏
页码:497 / 500
页数:4
相关论文
共 13 条
  • [11] SURFACE-MORPHOLOGY OF FLUX-GROWN SINGLE-CRYSTALS OF YBA2CU3O7-DELTA
    TAYLOR, KNR
    COOK, PS
    PUZZER, T
    MATTHEWS, DN
    RUSSELL, GJ
    GOODMAN, P
    [J]. JOURNAL OF CRYSTAL GROWTH, 1988, 88 (04) : 541 - 546
  • [12] TOWN SL, IN PRESS
  • [13] WU MK, 1987, PHYS REV LETT, V58, P980