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.
| Original language | English |
|---|---|
| Pages (from-to) | 8433-8439 |
| Number of pages | 7 |
| Journal | Ceramics International |
| Volume | 43 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2017 Aug 1 |
| Externally published | Yes |
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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
Cite this
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
}
TY - JOUR
T1 - Effect of F/Ba ratio of precursor solution on the properties of solution-processed YBCO superconducting films
AU - Bian, Weibai
AU - Chen, Yuanqing
AU - Huang, Wenhuang
AU - Zhao, Gaoyang
AU - Nishii, Junji
AU - Kaiju, Hideo
AU - Fujioka, Masaya
AU - Li, Lingwei
AU - Li, Na
AU - Yan, Fuxue
PY - 2017/8/1
Y1 - 2017/8/1
N2 - 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.
AB - 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.
KW - Films
KW - Low-fluorine solution
KW - Superconductivity
KW - YBaCuO
UR - http://www.scopus.com/inward/record.url?scp=85016473314&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85016473314&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2017.03.193
DO - 10.1016/j.ceramint.2017.03.193
M3 - Article
AN - SCOPUS:85016473314
VL - 43
SP - 8433
EP - 8439
JO - Ceramics International
JF - Ceramics International
SN - 0272-8842
IS - 11
ER -