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Proceedings Paper

Preparation and characterization of Tl2Ba2Ca2Cu3Ox superconducting thin films
Author(s): Wei Luo; Wen-Qing Yang; Huan Sheng Cheng; Dequan Yue; Ning Huang; Xiangfu Zong; Y. Q. Tang; Z. Z. Sheng; Gregory J. Salamo; F. T. Chan
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Paper Abstract

Superconducting Tl-Ba-Ca-Cu-O thin films have been fabricated by laser ablation. There are two steps in this process. First, an excimer laser is focused onto the Ba-Ca-Cu-O target forming a Ba-Ca-Cu-O plume. These particles are then deposited on substrate; second, the precursor films are placed into quartz tube to anneal in the presence of unfired Tl2Ba2Ca2Cu3O10 pellet to form the superconducting phase. Zero-resistance temperature Tc and critical current density Jc of the best film were 12 Ik and 1 X 106A/cm2 (at 77 K) respectively. X-ray diffraction (XRD) and secondary electron microscope (SEM) have been used to study the crystalline structure, while the composition are analyzed by high energy ion backscattering and checked with energy dispersion X-ray analysis (EDAX) and secondary ion mass spectroscopy (SIMS). Results show that these superconducting films are predominately composed of the (2223) phase and highly oriented. A platelet structure plays an important role on the quality of film.

Paper Details

Date Published: 26 October 1994
PDF: 4 pages
Proc. SPIE 2364, Second International Conference on Thin Film Physics and Applications, (26 October 1994); doi: 10.1117/12.190817
Show Author Affiliations
Wei Luo, Fudan Univ. (China)
Wen-Qing Yang, Fudan Univ. (China)
Huan Sheng Cheng, Fudan Univ. (China)
Dequan Yue, Fudan Univ. (China)
Ning Huang, Fudan Univ. (China)
Xiangfu Zong, Fudan Univ. (China)
Y. Q. Tang, Univ. of Arkansas (United States)
Z. Z. Sheng, Univ. of Arkansas (United States)
Gregory J. Salamo, Univ. of Arkansas (United States)
F. T. Chan, Univ. of Arkansas (United States)


Published in SPIE Proceedings Vol. 2364:
Second International Conference on Thin Film Physics and Applications

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