ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract 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 T c, onset = 80 K and T c,zero = 77 K was obtained. SEM studies of a sample prepared at 990 °C showed the presence of CuO and Ba2YCuO5 (211 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 T c,zero, temperature.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00356578
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