Non-Fermi-liquid scaling in UCu5-xPdx (x=1, 1.5)

We review the compiled measurements of the imaginary part of the dynamical magnetic susceptibility chi ''(omega, T), static susceptibility chi(T), electrical resistivity rho(T) and specific heat C(T) in the uranium intermetallics UCu5-xPdx (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 omega in the range 12 K < omega, 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.