High-temperature superconductivity in a Y-Ba-Cu-based system without extraneous oxygen
Nawazish A. Khan, M. Zafar Iqbal, N. Baber, Shazia Afzal, Umar S. Qurashi, G. Afshan, M. Mazhar
DOI 10.1103/PhysRevB.43.13622 · Physical Review B
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Abstract
The preparation of a high-temperature superconductor based on the Y-Ba-Cu-based system without the use of any extraneous oxygen is reported. Using starting materials with a maximum possible oxygen content of 3.5 oxygen atoms per formula unit of the end product and ambient nitrogen during synthesis, we observe ∼90-K superconductivity. This challenges the traditional understanding of the essential link between oxygen and superconductivity in these materials.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 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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