Abstract
We present a unified description of the imaginary part of the dynamical magnetic susceptibility χ''(ω,T) and measurements of the static susceptibility χ(T) and electrical resistivity ρ(T) in the uranium intermetallics UCu5 − xPdx (x = 1,1.5). For temperatures T and excitation energies ω in the range 12 K < ω, T < 150 K, our analysis demonstrates that the dynamics of isolated uranium ions are responsible for the observed temperature and frequency scaling, although interion interactions may become important at lower temperatures and frequencies. We derive a strict criterion for single-ion scaling in the form of a universal scaling function, providing a model-independent description of the compiled experimental data.
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