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

Published

August 1, 2004

Author(s)

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

Abstract

Phase diagrams of the Ba₂RCu₃O_6+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 Ba_2-x(Nd_1+x-yR_y) Cu₃O_6+z for R=Gd, Y and Yb, and Ba_2-x(R _1+x-yY_y) Cu₃O_6+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 Ba₂YC₃O_6+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.

Citation

Physica C-Superconductivity and Its Applications

Volume

408

Pub Type

Journals

Keywords

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

Citation

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 December 26, 2024)