Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

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 July 22, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created August 1, 2004, Updated February 19, 2017