YDy_xBa₂Cu₃O_7-δ Epitaxial Films Prepared by Chemical Solution Deposition

Abstract:

YBa₂Cu₃O_7-δ (YBCO) coated conductors have wide-ranging potential in large scale applications, such as, superconducting maglev trains and superconducting electric cables, but low current carrying capability restrains the practical application of YBCO coated conductors at high temperatures and high magnetic fields. It is crucial to develop YBCO coated conductors with high flux pinning capability. In this paper, epitaxial, dense, smooth and crack-free YDy_xBa₂Cu₃O_7-δ (x = 0~0.5) films were prepared on a LaAlO₃ (LAO) single crystal substrate via a fluorine-free polymer-assisted metal organic deposition (PA-MOD) method. The effects of Dy addition on the microstructure and superconducting character of YBCO films were investigated. The all films show a strong c-axis orientation and good texture in-plane and out of plane. The Dy addition to the YBCO film hardly affects the critical temperature of YBCO superconductor. The irreversibility fields of YBCO films can be improved with the Dy addition x = 0.5 compared to the pure YBCO film but decreased in the x = 0.3 sample.

• Periodical: Materials Science Forum (Volume 848)
• Pages: 669-674
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.848.669
• Online since: March 2016
• Authors: Hong Zhang, Yong Zhao, Wen Tao Wang, Yong Zhang, Ming Lei
• Keywords: Coated Conductor, Dy Addition, Epitaxial Films, Superconductor

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