Superconductivity of UPt3studied by mgr;+SR and neutron scattering (abstract)

摘要

The magnetic field penetration depth lgr; in single‐crystalline UPt3has been measured by muon spin relaxation ( mgr;+SR). The temperature dependence of lgr;−2is nonexponential and anisotropic decreasing from itsT=0 value proportional toTwhen measured perpendicular to thecaxis but with a higher‐power ∥c. Our data can be accounted for in detail by a superconducting gap with a line of nodes in the basal plane and axial point nodes. By neutron scattering we furthermore show that the antiferromagnetic order parameter of UPt3is perturbed by the development of superconductivity. We discuss the implications of these results on the symmetry of the superconducting states of UPt3.