NMR evidence for Kondo disorder in UCu3.5Pd1.5

We report on Cu nuclear quadrupole resonance (NQR) and nuclear magnetic res onance experiments probing the cubic non-Fermi-liquid compound UCu3.5Pd1.5 The NQR spectrum indicates a partial disorder in the occupation of Cu and P d sites, with a preferential occupation of the cubic c site by Pd. Our resu lts for the temperature dependence of the nuclear magnetization recovery sh ow unusual features that cannot be reconciled with common expectations for a simple metal, but they are well accounted for in a description using the Kondo disorder model. [S0163-1829(99)50740-6].