Rapid Pyrolysis of SmBa2Cu3O7-δ Films in CSD-MOD Using Extremely-Low-Fluorine Solutions
by
Minjuan Li 1, Pablo Cayado 2,*
, Manuela Erbe 2, Alexandra Jung 2, Jens Hänisch 2, Bernhard Holzapfel 2, Zhiyong Liu 1 and Chuanbing Cai 1
Minjuan Li 1, Pablo Cayado 2,*, Manuela Erbe 2, Alexandra Jung 2, Jens Hänisch 2, Bernhard Holzapfel 2, Zhiyong Liu 1 and Chuanbing Cai 1
1
Shanghai Key Laboratory of High Temperature Superconductors, Physics Department, Shanghai University, Shanghai 200444, China
2
Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
*
Author to whom correspondence should be addressed.
Coatings 2020, 10(1), 31; https://doi.org/10.3390/coatings10010031
Received: 18 November 2019 / Revised: 17 December 2019 / Accepted: 18 December 2019 / Published: 1 January 2020
(This article belongs to the Special Issue Superconducting Films and Nanostructures)
SmBa2Cu3O7-δ (SmBCO) films have been prepared by chemical solution deposition starting from extremely-low-fluorine solutions (7% fluorine with respect to standard full trifluoroacetate solutions). Smooth and homogeneous SmBCO films could be achieved at heating rates of up to 20 °C/min during pyrolysis. The best films were achieved at a crystallization temperature of 810 °C and 50 ppm of oxygen partial pressure. At these conditions, the ~270 nm thick SmBCO films grow mostly c-axis-oriented with values at 77 K of ~2 MA/cm2 and critical temperatures Tc of up to 95.0 K. These results demonstrate that using extremely-low-fluorine solutions is very attractive since the production rate can be largely increased due to the solutions’ robustness during pyrolysis retaining a remarkable quality of the grown films. Nevertheless, further optimization of the growth process is needed to improve the superconducting properties of the films.
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Keywords:
SmBCO; chemical solution deposition; rapid pyrolysis; metal-organic deposition; extremely low fluorine
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MDPI and ACS Style
Li, M.; Cayado, P.; Erbe, M.; Jung, A.; Hänisch, J.; Holzapfel, B.; Liu, Z.; Cai, C. Rapid Pyrolysis of SmBa2Cu3O7-δ Films in CSD-MOD Using Extremely-Low-Fluorine Solutions. Coatings 2020, 10, 31.
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