NMR/μSR and Non-Fermi-Liquid Behavior in Heavy Fermion Systems

Abstract

This paper deals with nuclear magnetic resonance (NMR) and muon spin rotation (μSR) experiments in heavy‐fermion (HF) systems which display non‐Fermi‐liquid (NFL) behavior. We review in particular our measurements in UCu5—xPdx (x = 1 and 1.5), and discuss how these experiments have contributed to our current understanding of the role of disorder in NFL properties. Recent experiments on CeRhRuSi2 are also described. Our experiments reveal the usefulness of NMR and —SR as ideal tools for detecting structural or intrinsic disorder and characterizing magnetic inhomogeneities in stoichiometric “ordered compounds”, which appear pristine to other techniques such as X‐rays and neutron scattering.