Time-dependent superconducting behavior of oxygen-deficient YBa2Cu3Ox: Possible annealing of oxygen vacancies at 300 K
B. W. Veal, H. You, A. P. Paulikas, H. Shi, Y. Fang, J. W. Downey
DOI 10.1103/PhysRevB.42.4770 · Physical Review B
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Abstract
Oxygen stoichiometries in single crystals of YBa2Cu3Ox are controlled by quenching from an O2-N2 atmosphere at 520 °C to liquid nitrogen. After quenching, the superconducting behavior and lattice parameters are found to be time dependent. Tc increases as much as 15 K in a period of several days. Apparently, annealing, with increasing oxygen vacancy order, occurs at room temperature.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93.1 | Pressure not reported | onset |
| YBa2Cu3O6.45 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37 | Pressure not reported | onset |
| YBa2Cu3O6.45 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 45 | Pressure not reported | onset |
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