Bulk superconductivity at an elevated temperature (Tc≊12 K) in a nickel containing alloy system Y-Ni-B-C
R. Nagarajan, Chandan Mazumdar, Zakir Hossain, S. K. Dhar, K. V. Gopalakrishnan, L. C. Gupta, C. Godart, B. D. Padalia, R. Vijayaraghavan
DOI 10.1103/PhysRevLett.72.274 · Physical Review Letters
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Abstract
We report here our discovery of bulk superconductivity at rather high Tc in samples having nominal compositions YNi4BO0.2 (Tc≊12.5 K) and YNi2B3O0.2 (Tc≊13.5 K). While YNi4BC0.2 seems to be a single phase material, YNi2B3C0.2 is a multiphase system. Our experimental results show that the two materials are distinct superconductors. Discovery of superconductivity in these materials is of significance since not only is their Tc high (>10 K) but they also have nickel in large proportions. No nickel-based ternary superconductor was previously known.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YNi4BC0.2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12.5 | Pressure unresolved | onset |
| YNi4BC0.2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11.2 | Pressure unresolved | zero_resistance |
| YNi4BC0.2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12.5 | Pressure unresolved | onset |
| YNi2B3C0.2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13.4 | Pressure unresolved | onset |
| YNi2B3C0.2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11.5 | Pressure unresolved | zero_resistance |
| YNi2B3C0.2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13.4 | Pressure unresolved | onset |
| Y2C3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11.5 | Pressure not reported | unknown |
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