Enhanced flux-pinning in fluorine-free MOD YBCO films by chemical doping |
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| Authors: | WT Wang MH Pu Y Yang H Zhang CH Cheng Y Zhao |
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| Institution: | 1. Key Laboratory of Magnetic Levitation and Maglev Trains (Ministry of Education of China), Superconductivity R&D Center (SRDC), Mail Stop 165#, Southwest Jiaotong University, Chengdu, Sichuan 610031, China;2. Superconductivity Research Group, School of Materials Science and Engineering, University of New South Wale, Sydney, 2052 NSW, Australia;3. Department of Physics, Peking University, Beijing 100871, China |
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| Abstract: | YBCO films without and with dilute cobalt and zinc doping were prepared on (0 0 l) LaAlO3 substrate by non-fluorine metal organic deposition method. Effects of dilute cobalt and zinc doping on biaxial texture, microstructure and flux-pinning properties of YBCO films were investigated. The surface density and smoothness of the doped YBCO films have been distinctly improved compared with that of the pure film. Dilute cobalt- and zinc-doped YBCO films exhibit significantly enhanced Jc values in the magnetic field. The best result is achieved in the cobalt-doped YBCO film. At 77 K, Jc values of cobalt-doped film are 1.7 and 5.4 times higher than that of pure film in 0.5 T and 1.5 T, respectively. These results strongly suggest that dilute cobalt and zinc doping is a promising way to increase the current carrying capability of YBCO films. |
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| Keywords: | Flux-pinning Chemical doping Fluorine-free MOD YBCO film |
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