YBaCuO Thin Film: Preparation by BaCl/BaF-MOD Method and Superconducting Property
Wuji Cailiao Xuebao/Journal of Inorganic Materials, ISSN: 1000-324X, Vol: 38, Issue: 2, Page: 199-204
2023
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Article Description
Conventional trifluoroacetic acid metal organic chemical solution deposition (TFA-MOD) method for the preparation of YBaCuO (YBCO) superconducting layers follows the BaF growth mechanism. In this work, a novel chemical solution method based on BaCl/BaF pathway for the growth of YBCO superconducting thin films was carried out. The effects of Cl addition on grain orientation, microstructure and superconductivity of YBCO thin films were investigated, and mechanism of the phase transition of YBCO thin films in the BaCl pathway was explored by thermochemical calculations of the growth reaction. The results show that the Cl addition inhibits a-axis grain orientation and promotes nucleation of c-axis grains. Onset transition temperature (T) of the YBCO 2-layer film is about 89.6 K without significant change after Cl addition . But its critical current density (J) is significantly increased to 2.07 MA/cm (77 K, self-field). Meanwhile, the phase transition of the growth reaction process shows that Cl is preferentially combined with Ba to form BaCl as much as possible, effectively avoiding the formation of BaCO. All results of this study indicate that Cl addition facilitates preparation of YBCO superconducting thick films, and provides a new idea for the preparation of YBCO by MOD method.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85151059885&origin=inward; http://dx.doi.org/10.15541/jim20220302; http://www.jim.org.cn/EN/10.15541/jim20220302; http://sciencechina.cn/gw.jsp?action=cited_outline.jsp&type=1&id=7407980&internal_id=7407980&from=elsevier; https://dx.doi.org/10.15541/jim20220302; https://www.jim.org.cn/EN/10.15541/jim20220302
Shanghai Institute of Ceramics
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