title: Magnetic quantum critical point and superconductivity in UPt3 doped with Pd.
abstract: Transverse-field muon spin relaxation measurements have been carried out on the heavy-fermion superconductor UPt (3) doped with small amounts of Pd. We find that the critical Pd concentration for the emergence of the large-moment antiferromagnetic phase is approximately 0.6 at. %Pd. At the same Pd content, superconductivity is completely suppressed. The existence of a magnetic quantum critical point in the phase diagram, which coincides with the critical point for superconductivity, provides evidence for ferromagnetic spin-fluctuation mediated odd-parity superconductivity, which competes with antiferromagnetic order.
authors.affiliation: Van der Waals-Zeeman Institute, University of Amsterdam, 1018 XE Amsterdam, The Netherlands.
authors.lastname: de Visser A
authors.forename: M J
authors.initials: MJ
authors.lastname: Graf
authors.forename: P
authors.initials: P
authors.lastname: Estrela
authors.forename: A
authors.initials: A
authors.lastname: Amato
authors.forename: C
authors.initials: C
authors.lastname: Baines
authors.forename: D
authors.initials: D
authors.lastname: Andreica
authors.forename: F N
authors.initials: FN
authors.lastname: Gygax
authors.forename: A
authors.initials: A
authors.lastname: Schenck