Magnetism and superconductivity in U2PtxRh1−xC2
N. Wakeham, Ni Ni, E. D. Bauer, J. D. Thompson, E. Tegtmeier, F. Ronning
DOI 10.1103/PhysRevB.91.024408 · Physical Review B
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Abstract
We report the phase diagram of the doping series U2PtxRh1−xC2, studied through measurements of resistivity, specific heat, and magnetic susceptibility. The Néel temperature of U2RhC2 of ∼22 K is suppressed with increasing Pt content, reaching zero temperature close to x=0.7, where we observed signatures of increased quantum fluctuations. In addition, evidence is presented that the antiferromagnetic state undergoes a spin-reorientation transition upon application of an applied magnetic field. This transition shows nonmonotonic behavior as a function of x, peaking at around x=0.3. Superconductivity is observed for x≥0.9, with Tc increasing with increasing x. The reduction in Tc and increase in residual resistivity with decreasing Pt content is inconsistent with the extension of the Abrikosov-Gor'kov theory to unconventional superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| U2PtC2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.47 | Pressure not reported | unknown |
| U2PtxRh1-xC2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| U2PtxRh1-xC2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| U2PtxRh1-xC2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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