Effect of F/Ba ratio of precursor solution on the properties of solution-processed YBCO superconducting films

Weibai Bian; Yuanqing Chen; Wenhuang Huang; Gaoyang Zhao; Junji Nishii; Hideo Kaiju; Masaya Fujioka; Lingwei Li; Na Li; Fuxue Yan

doi:10.1016/j.ceramint.2017.03.193

Effect of F/Ba ratio of precursor solution on the properties of solution-processed YBCO superconducting films

Weibai Bian, Yuanqing Chen, Wenhuang Huang, Gaoyang Zhao, Junji Nishii, Hideo Kaiju, Masaya Fujioka, Lingwei Li, Na Li, Fuxue Yan

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

YBa₂Cu₃O_7−x (YBCO) thin films (with thickness of 220–230 nm) and thick films (with thickness of 1.1–1.2 µm) were prepared using low fluorine solutions with different F/Ba ratios (F/Ba=1–4.5). The effect of F/Ba ratio on the properties of the films was systematically investigated. The results showed that films derived from solutions with F/Ba<2, regardless of whether they were thin or thick, showed poor superconductivity due to the formation of BaCO₃ intermediate phase. When solutions with F/Ba≥2 were used, the superconductivity of as-prepared YBCO films was related to not only the film thickness, but also the F/Ba ratio in the solution. It was found that, for thick films derived from F/Ba>2 solutions, the formation of BaF₂/BaOF phase was retarded by the decomposition of Ba_1−xY_xF_2+x (BYF) intermediate phase. We also found that extra fluorine in the solution resulted in a large number of impurities and a-axis grains in the thick films, degrading the film superconductivity. F/Ba=2 was the optimal ratio in the solution to fabricate high-J_c YBCO thick films.

Original language	English
Pages (from-to)	8433-8439
Number of pages	7
Journal	Ceramics International
Volume	43
Issue number	11
DOIs	https://doi.org/10.1016/j.ceramint.2017.03.193
Publication status	Published - 2017 Aug 1
Externally published	Yes

Keywords

Films
Low-fluorine solution
Superconductivity
YBaCuO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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Effect of F/Ba ratio of precursor solution on the properties of solution-processed YBCO superconducting films. / Bian, Weibai; Chen, Yuanqing; Huang, Wenhuang; Zhao, Gaoyang; Nishii, Junji; Kaiju, Hideo; Fujioka, Masaya; Li, Lingwei; Li, Na; Yan, Fuxue.

In: Ceramics International, Vol. 43, No. 11, 01.08.2017, p. 8433-8439.

Research output: Contribution to journal › Article › peer-review

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title = "Effect of F/Ba ratio of precursor solution on the properties of solution-processed YBCO superconducting films",

abstract = "YBa2Cu3O7−x (YBCO) thin films (with thickness of 220–230 nm) and thick films (with thickness of 1.1–1.2 µm) were prepared using low fluorine solutions with different F/Ba ratios (F/Ba=1–4.5). The effect of F/Ba ratio on the properties of the films was systematically investigated. The results showed that films derived from solutions with F/Ba<2, regardless of whether they were thin or thick, showed poor superconductivity due to the formation of BaCO3 intermediate phase. When solutions with F/Ba≥2 were used, the superconductivity of as-prepared YBCO films was related to not only the film thickness, but also the F/Ba ratio in the solution. It was found that, for thick films derived from F/Ba>2 solutions, the formation of BaF2/BaOF phase was retarded by the decomposition of Ba1−xYxF2+x (BYF) intermediate phase. We also found that extra fluorine in the solution resulted in a large number of impurities and a-axis grains in the thick films, degrading the film superconductivity. F/Ba=2 was the optimal ratio in the solution to fabricate high-Jc YBCO thick films.",

keywords = "Films, Low-fluorine solution, Superconductivity, YBaCuO",

author = "Weibai Bian and Yuanqing Chen and Wenhuang Huang and Gaoyang Zhao and Junji Nishii and Hideo Kaiju and Masaya Fujioka and Lingwei Li and Na Li and Fuxue Yan",

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AU - Bian, Weibai

AU - Chen, Yuanqing

AU - Huang, Wenhuang

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AU - Nishii, Junji

AU - Kaiju, Hideo

AU - Fujioka, Masaya

AU - Li, Lingwei

AU - Li, Na

AU - Yan, Fuxue

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