Unusual ground-state properties of UPd2Al3: Implications for the coexistence of heavy-fermion superconductivity and local-moment antiferromagnetism

R. Caspary; P. Hellmann; M. Keller; G. Sparn; C. Wassilew; R. Köhler; C. Geibel; C. Schank; F. Steglich; N. E. Phillips

doi:10.1103/PhysRevLett.71.2146

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Unusual ground-state properties of UPd2Al3: Implications for the coexistence of heavy-fermion superconductivity and local-moment antiferromagnetism

R. Caspary, P. Hellmann, M. Keller, G. Sparn, C. Wassilew, R. Köhler, C. Geibel, C. Schank, F. Steglich, N. E. Phillips

DOI 10.1103/PhysRevLett.71.2146 · Physical Review Letters

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Abstract

We report measurements of the resistivity and the specific heat, performed as a function of temperature, magnetic field, and hydrostatic pressure on the antiferromagnetic (TN=14 K) heavy-fermion superconductor (Tc=2 K) UPd2Al3. Our results suggest a coexistence of two subsystems with more localized 5f states responsible for the magnetic properties and less localized states responsible for the superconducting properties. The latter are compatible with an order parameter of octagonal d-wave symmetry.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
UPd2Al3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2	Pressure not reported	unknown
UPd2Al3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2	Pressure not reported	unknown
UPd2Al3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.55	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
URu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
UNi2Al3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown