Preparation of YBCO superconductor thin film by spin-coating method with metal-organic precursors

✍ Scribed by S. C. Fang; C. H. Huang; I. C. Chen; C. F. Liaw; W. -M. Hurng

• Book ID: 104738065
• Publisher: Springer
• Year: 1994
• Tongue: English
• Weight: 749 KB
• Volume: 29
• Category: Article
• ISSN: 0022-2461
• DOI: 10.1007/bf00356578

✦ Synopsis

YBCO thin film was prepared by the spin-coating method with metal-organic precursors. The precursors were synthesized by reacting metal acetates with 2-ethylhexanic acid or by reacting metal halides with ammonium 2-ethylhexanate directly. After proper heat treatments, YBCO film with Tc, onset = 80 K and Tc, zero = 77 K was obtained. SEM studies of a sample prepared at 990~ showed the presence of CuO and Ba2YCuO5 (21 1 phase). This suggested the transient presence of a liquid phase which had been observed in preparing YBCO bulk material by the melt-texture method before the formation of YBCO phase. Furthermore, many voids were observed in the as-obtained film. These might be the origin of the relatively low Tc, zero temperature.