中国物理B ›› 2004, Vol. 13 ›› Issue (2): 238-242.doi: 10.1088/1009-1963/13/2/020
朱亚彬, 周岳亮, 王淑芳, 刘震, 张芹, 陈正豪, 吕惠宾, 杨国桢
Zhu Ya-Bin (朱亚彬), Zhou Yue-Liang (周岳亮), Wang Shu-Fang (王淑芳), Liu Zhen (刘震), Zhang Qin (张芹), Chen Zheng-Hao (陈正豪), Lü Hui-Bin (吕惠宾), Yang Guo-Zhen (杨国桢)
摘要: Superconducting thick films were grown on single crystals MgO and YSZ by electrophoretic deposition with Y_2BaCuO_5(Y211) addition. YBCO thick films were then accomplished by sintering the precursor films above the peritectic temperature. Single crystals of MgO (3×3×0.5 mm^3) were used as top-seed to control crystal structure of the thick films. As shown by scanning electron microscopy, the morphologies of YBCO/YSZ and YBCO/MgO thick films are spherulitic texture and platelet type. The critical temperature is ~89 K for the YBCO/YSZ thick film; the onset transition temperature is 86.4 K and the transition width is ~3 K for YBCO/MgO thick film. The critical current densities (as determined by Bean model) are, in A/cm^2, 3870 (77 K) for YBCO/YSZ thick films and 2399 (77 K) for YBCO/MgO thick films, which are comparable to the best J_c reported of the thick films prepared by the same method.
中图分类号: (Superconducting films and low-dimensional structures)