Abstract Superconducting thick films were grown on single crystals MgO and YSZ by electrophoretic deposition with Y$_2$BaCuO$_5$(Y211) addition. YBCO thick films were then accomplished by sintering the precursor films above the peritectic temperature. Single crystals of MgO ($3\times3\times0.5$ 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 $\sim$89 K for the YBCO/YSZ thick film; the onset transition temperature is 86.4 K and the transition width is $\sim3$ 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 $J_{\rm c}$ reported of the thick films prepared by the same method.
Received: 06 June 2003
Revised: 13 October 2003
Accepted manuscript online:
PACS:
74.78.-w
(Superconducting films and low-dimensional structures)
(Effects of material synthesis, crystal structure, and chemical composition)
Fund: Project supported by the State Key Development Program for Basic Research of China (Grant No 1999064604).
Cite this article:
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) Fabrication of YBCO/YSZ and YBCO/MgO thick films using electrophoretic deposition with top-seeded melt growth process 2004 Chinese Physics 13 238
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