Superconductivity of the single-phase compound Er1Ba2Cu3O9−δ: Transport and structural properties
John P. Golben, Sung-Ik Lee, Sang Young Lee, Yi Song, Tae W. Noh, Xiao-Dong Chen, J. R. Gaines, Rodney T. Tettenhorst
DOI 10.1103/PhysRevB.35.8705 · Physical Review B
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Abstract
We report electrical and structural measurements on the high-Tc single-phase superconductor Er1Ba2Cu3O9−δ. Our best samples have relatively low room-temperature resistance and superconducting onset temperature of 94 K. The structure of the single phase is found to be an orthorhombic perovskite similar to the one reported for the Y1Ba2Cu3O9−δ compound, but different from the K2NiF4 perovskite structure found in the earlier high-Tc compounds. The calculated effect of possible oxygen deficiencies in several of the crystal planes will be discussed. The x-ray diffraction spectrum shows that there could be more than one phase present, depending on the preparation conditions.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Er1Ba2Cu3O9-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 94 | Pressure not reported | onset |
| Er1Ba2Cu3O9-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93.5 | Pressure not reported | midpoint |
| Er1Ba2Cu3O9-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | zero_resistance |
| Y1Ba2Cu3O9-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
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