Superconductivity at 90 K in a multiphase oxide of Y-Ba-Cu
J. M. Tarascon, L. H. Greene, W. R. McKinnon, G. W. Hull
DOI 10.1103/PhysRevB.35.7115 · Physical Review B
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Abstract
We have measured the resistance and dc susceptibility in a series of multiphase Y-M-Cu oxides, where M=Ca, Sr, and Ba. We find superconductivity in two of the Ba samples, of nominal composition Y2−xBaxCuO4−y with x=0.20 and x=0.25 For x=0.25, the midpoint of the resistive transition is 91 K, the resistance has reached zero by 83 K, and the Meissner signal reaches 2% of that expected for an ideal bulk superconductor at low temperatures.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Y2-xBaxCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91 | Pressure not reported | midpoint |
| Y2-xBaxCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 83 | Pressure not reported | zero_resistance |
| Y2-xBaxCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91 | Pressure not reported | unknown |
| La2-xMCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 40 | Pressure not reported | unknown |
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