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

Yue Zhao, Xiao Tang, Wei Wu, Jean-Claude Grivel
2014 Journal of Physics, Conference Series  
In order to understand the all-chemical-solution-deposition (CSD) processes for manufacturing coated conductors, we investigated the phase evolution of YBa 2 Cu 3 O 7 (YBCO) films deposited by a low-fluorine metal-organic solution deposition (LF-MOD) method on CSD derived Ce 0.9 La 0.1 O 2 /Gd 2 Zr 2 O 7 /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
more » ... rganic 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 BaCeO 3 , NiWO 4 and NiO) is strongly related to the annealing temperature, i.e., the diffusion controlled reactions become intensive from 760 o C, 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/cm 2 (77 K, self field) is achieved in a 200 nm thick YBCO film in the architecture made by our all CSD route.
doi:10.1088/1742-6596/507/1/012056 fatcat:pyfxtvekirg2pdynqmgnj7bwiq