Superconductivity in SrNi2As2 single crystals
E. D. Bauer, F. Ronning, B. L. Scott, J. D. Thompson
DOI 10.1103/PhysRevB.78.172504 · Physical Review B
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Abstract
The electrical resistivity ρ(T) and heat capacity C(T) on single crystals of SrNi2As2 and EuNi2As2 are reported. While there is no evidence for a structural transition in either compound, SrNi2As2 is found to be a bulk superconductor at Tc=0.62 K with a Sommerfeld coefficient of γ=8.7 mJ/mol K2 and a small upper critical field Hc2∼200 Oe. No superconductivity was found in EuNi2As2 above 0.4 K, but anomalies in ρ and C reveal that magnetic order associated with the Eu2+ magnetic moments occurs at Tm=14 K.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SrNi2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.66 | Pressure not reported | midpoint |
| SrNi2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.62 | Pressure not reported | onset |
| LaFeAsO1-xFx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | unknown |
| BaNi2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| LaNiPO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.6 | Pressure not reported | unknown |
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