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A Systematic Study of the Effects of Metal Substitutions for Cu in Yba2(Cu1-XMX)3O7-δ, M=Fe, Co, Al, Ga, Cr, Ni, and Zn

Published online by Cambridge University Press:  28 February 2011

Youwen Xu ,
A. R. Moodenbaugh ,
Y. L. Wang ,
M. Suenaga  and
R. L. Sabatini
Youwen Xu
Affiliation:
Materials Science Division, Brookhaven National Lab. Upton, NY 11973
A. R. Moodenbaugh
Affiliation:
Materials Science Division, Brookhaven National Lab. Upton, NY 11973
Y. L. Wang
Affiliation:
Materials Science Division, Brookhaven National Lab. Upton, NY 11973
M. Suenaga
Affiliation:
Materials Science Division, Brookhaven National Lab. Upton, NY 11973
R. L. Sabatini
Affiliation:
Materials Science Division, Brookhaven National Lab. Upton, NY 11973
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Abstract

A series of polycrystalline YBa2(Cu1‐xMx)3O7‐δ (1:2:3) samples with a typical grain size > 10μm was prepared using well controlled and reproducible precedures. This relatively large grain size allowed microprobe studies of individual grains to determine M content of the 1:2:3 phase. Solubility limits of substitutions for Cu in these samples are estimated. Superconducting transition temperatures and lattice parameters are presented. In the case of Ga, microprobe studies show no evidence for Ga content of 1:2:3 above x=0.01. Preliminary studies show no evidence for solid solution above x=0.01 when substituting Mn, Cr, Zr, and Ti for Cu in 1:2:3.

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References

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