Extraordinary Effect of Aluminum Substitution on the Upper Critical Field of Ba2YCu3O7

Authors

Robert B. Van Dover, Cornell UniversityFollow
Lynn Schneemeyer, Montclair State UniversityFollow
Joseph V. Waszczak, University of WashingtonFollow
D. A. Rudman, Massachusetts Institute of Technology
J. Y. Juang, Massachusetts Institute of TechnologyFollow
J. A. Cutro, Massachusetts Institute of TechnologyFollow

Document Type

Article

Publication Date

1-1-1989

Abstract

A 10% substitution of Al on the Cu(1) (chain) site of single crystals of Ba2YCu3O7 drives the material to the edge of the orthorhombic-tetragonal transition and strongly decreases the resistivity and upper critical field, compared to the unsubstituted parent compound, but has little effect on Tc. The coherence length in the ĝ-b^ plane increases twofold, while the coherence length along the axis is unchanged. These results can be reconciled with the conventional relationships between superconducting and normal-state properties only if a twofold change in the Fermi-surface area is postulated.

DOI

10.1103/PhysRevB.39.2932

Montclair State University Digital Commons Citation

Van Dover, Robert B.; Schneemeyer, Lynn; Waszczak, Joseph V.; Rudman, D. A.; Juang, J. Y.; and Cutro, J. A., "Extraordinary Effect of Aluminum Substitution on the Upper Critical Field of Ba2YCu3O7" (1989). Department of Chemistry and Biochemistry Faculty Scholarship and Creative Works. 19.
https://digitalcommons.montclair.edu/chem-biochem-facpubs/19