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X-Ray Absorption Studies of Vanadium-Containing Yba2Cu3O7

Published online by Cambridge University Press:  28 February 2011

Z. Tan,
J. I. Budnick,
W. Q. Chen,
B. R. Weinbergers and
L. Lynds
Z. Tan
Affiliation:
University of Connecticut, Physics Department and Institute of Materials Science, Storrs, CT 06269.
J. I. Budnick
Affiliation:
University of Connecticut, Physics Department and Institute of Materials Science, Storrs, CT 06269.
W. Q. Chen
Affiliation:
University of Connecticut, Physics Department and Institute of Materials Science, Storrs, CT 06269.
B. R. Weinbergers
Affiliation:
United Technologies Research Center, East Hartford, CT 06108.
L. Lynds
Affiliation:
United Technologies Research Center, East Hartford, CT 06108.
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Abstract

Attempted V substitution leads to small but observable lattice expansions of the YBa2Cu3O7 main phase but has little effect on the superconducting transition temperature. X‐ray absorption spectra at the AT‐edges of V, Cu and Y and L3‐edge of Ba have been measured on vanadium‐containing YBa2Cu3O7 to address the question of V substitution in this material. We found that only a small amount of V can substitute into the YBa2Cu3O7 structure. The excess V forms an impurity phase in which V is tetrahedrally coordinated with oxygens.

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References

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