Preparation and characterization of Tl2Ba2Ca2Cu3Ox superconducting thin films

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

doi:10.1117/12.190817

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26 October 1994 Preparation and characterization of Tl₂Ba₂Ca₂Cu₃O_x superconducting thin films

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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Proceedings Volume 2364, Second International Conference on Thin Film Physics and Applications; (1994) https://doi.org/10.1117/12.190817
Event: Thin Film Physics and Applications: Second International Conference, 1994, Shanghai, China

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.

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Wei Luo, Wen-Qing Yang, Huan Sheng Cheng, Dequan Yue, Ning Huang, Xiangfu Zong, Y. Q. Tang, Z. Z. Sheng, Gregory J. Salamo, and F. T. Chan "Preparation and characterization of Tl₂Ba₂Ca₂Cu₃O_x superconducting thin films", Proc. SPIE 2364, Second International Conference on Thin Film Physics and Applications, (26 October 1994); https://doi.org/10.1117/12.190817

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