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Proceedings Paper

In-situ laser preparation of high-Tc superconducting thin film at 450-550 degree C
Author(s): Chengwu An; Yongchang Fan; Dongsheng Lu; Zaiguang Li
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Paper Abstract

Superconducting thin films of Y-Ba-Cu-O on zirconia substrate are prepared using excimer laser (308 nm, 28 ns) ablation of a superconducting Y-Ba-Cu oxide disk without plasma assistance in the substrate temperature range from 450 - 550 degree(s)C. The high or low- temperature post-annealing in an oxygen atmosphere is not necessary. The highest zero resistance temperature of the produced film is up to 91.5 K. X-ray diffraction spectra reveal that the thin films are preferential x-axis orientation normal to the surface. The key to the success is increasing the oxygen pressure in the deposition chamber to about 220 mTorr and making the ejected oxygen interact with the laser beam before it comes to the deposition area. The influences of the oxygen pressure ejected into the chamber, of the laser flux density and of the substrate temperature on the superconducting property of the produced thin films are discussed.

Paper Details

Date Published: 1 November 1991
PDF: 4 pages
Proc. SPIE 1519, International Conference on Thin Film Physics and Applications, (1 November 1991); doi: 10.1117/12.47265
Show Author Affiliations
Chengwu An, Huazhong Univ. of Science and Technology (China)
Yongchang Fan, Huazhong Univ. of Science and Technology (China)
Dongsheng Lu, Huazhong Univ. of Science and Technology (China)
Zaiguang Li, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 1519:
International Conference on Thin Film Physics and Applications
Shixun Zhou; Yongling Wang, Editor(s)

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