Non-Fermi-liquid scaling in ( x = 1, 1.5)

We review the compiled measurements of the imaginary part of the dynamical magnetic susceptibility X(ω, T), static susceptibility χ(T), electrical resistivity ρ(T) and specific heat C(T) in the uranium intermetallics UCu 5-x Pd x (x = 1, 1.5). We assess the temperature- and energy-dependences predicted by single-ion and disorder-dominated models and compare these results to experiments. For temperatures T and excitation energies ω in the range 12 K < ω, T < 150 K, our analysis suggests that the dynamics of isolated uranium ions are responsible for the observed temperature and frequency scaling, although inter-ion interactions may become important at lower temperatures and frequencies.