High-field ordered and superconducting phases in the heavy-fermion compound PrOs4Sb12
P.-C. Ho, N. A. Frederick, V. S. Zapf, E. D. Bauer, T. D. Do, M. B. Maple, A. D. Christianson, A. H. Lacerda
DOI 10.1103/PhysRevB.67.180508 · Physical Review B
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Abstract
The filled-skutterudite compound PrOs4Sb12, the first example of a Pr-based heavy-fermion superconductor, displays superconductivity with Tc∼1.85K and has an effective mass m*∼50me, where me is the free-electron mass. For magnetic fields above 4.5 T, sharp features in the normal-state electrical resistivity, magnetization, specific-heat, and thermal-expansion data suggest the occurrence of a phase transition at high fields. This high-field ordered phase in the normal state may be associated with a combination of crystalline electric fields, Zeeman splitting, and quadrupolar ordering. We present an investigation of the electrical resistivity and magnetization of PrOs4Sb12 as a function of temperature between 350 mK and 3.5 K and magnetic field up to 18 T. The data reveal a detailed phase boundary of the high-field ordered phase as well as the lower critical field Hc1 and the onset field of the peak effect in the superconducting state of PrOs4Sb12.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| PrOs4Sb12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.85 | Pressure not reported | unknown |
| PrOs4Sb12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.85 | Pressure not reported | unknown |
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