Author:
Jiang Yanling,Yue Hongwei,Wei Jinzhong,Chen Mingxian,Han Xu,Jin Yanying,Tang Pingying,Huang Guohua,Xie Qinglian
Abstract
Abstract
Tl-2212 superconducting thin films were fabricated on LaAlO3 (00l) substrates by sol-gel method. In the process, the precursor films were annealed in various gas atmospheres. XRD and EDX testing results showed that the precursors annealed in O2 converted into pure Tl-2212 superconducting phase, and the nominally stoichiometric cation ratio of TlBaCaCu was close to 2:2:1:2. The Tl-2212 film had a layered morphology and medium-quality superconductive parameters, which included the critical temperature T
c of 105.5 K, and the critical current density J
c of 0.8 MA/cm2 (self-field, 77K).
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