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Phase Equilibria of Ba-R-Cu-O-F-OH for Coated-Conductor Applications (R=Lanthanides and Y)



Winnie K. Wong-Ng, Lawrence P. Cook, Igor Levin, J Suh, Ron Feenstra, T J. Haugan, P. D. Barnes


Phase diagrams of the Ba2RCu3O6+x (R=Nd, Sm, Gd, Y, and Er) superconductors, prepared under 0.1 % 02 at 810 C, reflect the trend of the lanthanide contraction. The single-phase regions of Ba2-x(Nd1+x-yRy) Cu3O6+z for R=Gd, Y and Yb, and Ba2-x(R 1+x-yYy) Cu3O6+z for R=Eu and Gd were determined. Using these data, both flux-pinning and melting properties can be tailored and optimized. The presence of a low-temperature melt during formation of the Ba2YC3O6+x phase from barium fluoride amorphous precursor films is deemed important for producing quality tapes, and hence for rapid advancement of second-generation RABiTS/IBAD coated conductor technology. Our search for low melting liquid focused on the compositional vector within the Ba, Y, Cu//O, F reciprocal system.
Physica C-Superconductivity and Its Applications


Ba Y Cu//O, F, Ba-R-Cu-O (R=lanthanides and yttrium), phase equilibria, superconductors


Wong-Ng, W. , Cook, L. , Levin, I. , Suh, J. , Feenstra, R. , Haugan, T. and Barnes, P. (2004), Phase Equilibria of Ba-R-Cu-O-F-OH for Coated-Conductor Applications (R=Lanthanides and Y), Physica C-Superconductivity and Its Applications (Accessed April 13, 2024)
Created August 1, 2004, Updated February 19, 2017