MOD-Derived YBa₂Cu₃O_7-δ Thin Films using a Fast Pyrolysis Process

Abstract:

In the present work, a fast pyrolysis process is developed for YBa₂Cu₃O_7-δ (YBCO) films preparation with trifluroacetates metalorganic deposition technique (TFA-MOD). The decomposition of TFA salts as well as the surface morphology of pyrolyzed films is investigated with respect to the pyrolysis temperature and its heating rate. Two typical surface morphologies for the pyrolyzed films, being smooth or buckled, are revealed subjecting to the heating rate and film thickness, which related to the subsequent YBCO films property. Smooth and wrinkle-free pyrolyzed films are achieved by using this fast pyrolysis process with a heating rate as high as 5°C/min. The final crystallized YBCO films exhibit good performances with the superconducting transition temperature of 91 K and critical current density of 2.0 MA/cm² at 77 K, suggesting a rapid, promising MOD route available for scale-up preparation of YBCO coated conductors.

• Periodical: Materials Science Forum (Volumes 745-746)
• Pages: 267-274
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.745-746.267
• Online since: February 2013
• Authors: Wen Jia Hao, Yu Ming Lu, Chuan Yi Bai, Zhi Yong Liu, Bo Gao, Chuan Bing Cai
• Keywords: Pyrolysis, TFA-MOD, Wrinkle, YBCO

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