Structural and superconducting properties of orthorhombic and tetragonal YBa2Cu3O7−x: The effect of oxygen stoichiometry and ordering on superconductivity
J. D. Jorgensen, B. W. Veal, W. K. Kwok, G. W. Crabtree, A. Umezawa, L. J. Nowicki, A. P. Paulikas
DOI 10.1103/PhysRevB.36.5731 · Physical Review B
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Abstract
The structural and superconducting properties of orthorhombic and tetragonal YBa2Cu3O7−x have been determined for a wide range of stoichiometries (0.3<x<0.7). In the orthorhombic phase, Tc decreases smoothly as x increases and reaches zero at the orthorhombic-to-tetragonal transition. Tetragonal YBa2Cu3O7−x is not superconducting at any stoichiometry. This systematic depression of Tc is correlated with the decrease in the oxygen content which alters the electronic structure of the Cu-O networks.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure unresolved | midpoint |
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