Oxygen intercalation homogeneity and electrical transport in superconducting Ba2YCu3O7−δ crystals
A. T. Fiory, S. Martin, L. F. Schneemeyer, R. M. Fleming, A. E. White, J. V. Waszczak
DOI 10.1103/PhysRevB.38.7129 · Physical Review B
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Abstract
The intercalation of oxygen in twinned single crystals of Ba2YCu3O7−δ occurs by diffusion along basal a−b planes, as shown by time-dependent resistivity measurements at elevated temperatures. Separation of the oxygen-deficient 60-K phase in crystals annealed in O2 is revealed by an anomalous temperature dependence of the resistance along the c direction. Susceptibility analysis shows that oxygenation and the sharpness of the superconducting transition can be enhanced significantly, with no change in Tc, by F-ion implantation followed by rediffusion of oxygen.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba2YCu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85 | Pressure not reported | onset |
| Ba2YCu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 60 | Pressure not reported | unknown |
| Ba2YCu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 55 | Pressure not reported | unknown |
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