Logarithmic ac response in the heavy-fermion superconductor URu2Si2
P. Visani, Y. Dalichaouch, M. A. Lopez de la Torre, B. W. Lee, C. L. Seaman, M. B. Maple
DOI 10.1103/PhysRevB.49.4376 · Physical Review B
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Abstract
ac-magnetic-susceptibility χac(T) measurements as a function of frequency f and excitation field hac have been performed on a single crystal of the heavy-fermion superconductor URu2Si2 in magnetic fields H up to 30 kOe applied along the c axis. The apparent superconducting transition temperature Tc shows an unexpected and approximately logarithmic increase (decrease) with f (hac) that is enhanced with H, which suggests the existence of an irreversibility line below the upper critical field Hc2(T) in URu2Si2. Isothermal χac vs H sweeps were used to define Hc2(T) which was independent of f and hac.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| URu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.37 | Pressure not reported | onset |
| CeCu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| UBe13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.16 | Pressure not reported | unknown |
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