Phase Evolution of YBa2Cu3O7-x films by all-chemical solution deposition route for coated conductors

Zhao Yue, Xiao Tang, Wei Wu, Jean-Claude Grivel

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Abstract

In order to understand the all-chemical-solution-deposition (CSD) processes for manufacturing coated conductors, we investigated the phase evolution of YBa2Cu3O7 (YBCO) films deposited by a low-fluorine metal-organic solution deposition (LF-MOD) method on CSD derived Ce0.9La0.1O2/Gd2Zr2O7/NiW. It is shown that the phase transition from the pyrolyzed film to fully converted YBCO film in the LF-MOD process is similar to that in typical trifluoroacetates-metal organic deposition (TFA-MOD) processes even though the amount of TFA in the solution is reduced by almost one half compared with typical TFA-MOD cases. Moreover, we found that the formation of impurities (mainly BaCeO3, NiWO4 and NiO) is strongly related to the annealing temperature, i.e., the diffusion controlled reactions become intensive from 760 oC, which might be connected with the poor structural and superconducting properties of the films deposited at high sintering temperatures. Based on these results, the optimized growth conditions of YBCO films were established, and a high critical current density (Jc) of about 2 MA/cm2 (77 K, self field) is achieved in a 200 nm thick YBCO film in the architecture made by our all CSD route.
Original languageEnglish
Article number012056
Book seriesJournal of Physics: Conference Series (Online)
Volume507
Issue number1
Number of pages4
ISSN1742-6596
DOIs
Publication statusPublished - 2014
Event11th European Conference on Applied Superconductivity - Genova, Italy
Duration: 15 Sep 201319 Sep 2013
Conference number: 11

Conference

Conference11th European Conference on Applied Superconductivity
Number11
CountryItaly
CityGenova
Period15/09/201319/09/2013

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