Abstract
Superconducting YBa2Cu3O7−x (YBCO) films were prepared using an ultralow-fluorine sol with F/Ba = 2, which was synthesized using fluorine-contained barium trifluoroacetate (Ba-TFA), and fluorine-free yttium, barium, and copper salts. The mole ratio of F/Ba = 2 was realized in the sol by controlling the content of Ba-TFA. During the pyrolysis process, the fluorine-free and fluorine-contained Ba-salts were found to be completely converted to BaF2 phase, and almost no corrosive fluorinated gases (such as HF gas) were released out of the film, resulting in the film with smooth surface even under a high heating rate of 10–15 °C/min. Single-coated YBCO film (~280 nm) with critical current density (Jc) of 5 MA/cm2 (77 K, 0 T), and double-coated film (~550 nm) with Jc over 3.5 MA/cm2 (77 K, 0 T) were obtained on LaAlO3 single crystal substrates. Compared with YBCO films deposited from solutions with higher fluorine content, the ultralow-fluorine sol–gel deposited YBCO films showed comparable superconductivity, but improved surface quality and production rate.
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References
Glowacki BA, Mosiadz M (2009) J Sol-Gel Sci Technol 51:335
Foltyn SR, Civale L, MacManus-Driscoll L, Jia QX, Maiorov B, Wang H, Maley M (2007) Nat Mater 6:631
Vermeir P, Deruyck F, Feys J, Lommens P, Schaubroeck J, Driessche IV (2012) J Sol-Gel Sci Technol 62:378
Erbe M, Hanisch J, Freudenberg T, Kirchner A, Monch I, Kaskel S, Schultz L, Holzapfel B (2014) J Mater Chem A 2:4932
Tokunaga Y, Honjo T, Izumi T, Shiohara Y, Iijima Y, Saitoh T, Goto T, Yoshinaka A, Yajima A (2004) Cryogenics 44:817
Chen Y, Zhao G, Lei L, Liu X (2007) Supercond Sci Technol 20:251
Chen Y, Wu C, Zhao G, You C (2012) Supercond Sci Technol 25:062001
Gyorgy EM, Van Dover RB, Jackson KA, Schneemeyer LF, Waszczak JV (1989) Appl Phys Lett 55:283
Wu W, Feng F, Shi K, Zhai W, Qu T, Huang R, Tang X, Wang X, Hu Q, Grivel JC, Han Z (2013) Supercond Sci Technol 26:055013
Nakaoka K, Tokunaga Y, Matsuda JS, Fuji H, Koyama S, Teranishi R, Izumi T, Shiohara Y, Watanabe T, Yamada Y, Goto T, Yoshinaka A, Yajima A (2005) Phys C 426–431:954–958
Ye J, Nakamura K (1993) Phys Rev B 48:7554
Zeng L, Lu YM, Liu ZY, Chen CZ, Gao B, Cai CB (2012) J Appl Phys 112:053903
Zalamova K, Pomar A, Palau A, Puig T, Obradors X (2010) Supercond Sci Technol 23:014012
Sobolev BP, Tkachenko NL (1982) J Less Common Met 85:155
Smith JA, Cima MJ, Sonnenberg N (1999) IEEE Trans Appl Supercond 9:1531
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This work is supported by the National Natural Science Foundation of China (No. 51102195), the Foundation of Science and Technology of Shaanxi Province (No. 2013KJXX-36), and the Scientific Research Program Funded by Shaanxi Provincial Education Department (14JK1531).
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Chen, Y., Yin, X., Feng, Y. et al. High-efficiency preparation of high-quality YBCO superconducting films using an ultralow-fluorine sol–gel method. J Sol-Gel Sci Technol 74, 249–255 (2015). https://doi.org/10.1007/s10971-014-3606-z
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DOI: https://doi.org/10.1007/s10971-014-3606-z