Non–Fermi-liquid scaling in UCu_5-xPd_x (x=1, 1.5): A phenomenological description

¹ The Harrison M. Randall Laboratory of Physics, University of Michigan, Ann Arbor MI 48109-1120, USA
² Department of Physics, University of California at San Diego, La Jolla, California, 92093 USA
³ Department of Physics, University of Oxford, 1 Keble Road, Oxford, UK
⁴ Materials Sciences Division, Argonne National Laboratory Argonne IL 60439-4845 USA

Received: 17 July 1996
Accepted: 18 September 1997

Abstract

We present a unified description of the imaginary part of the dynamical magnetic susceptibility and measurements of the static susceptibility and electrical resistivity in the uranium intermetallics (x=1, 1.5). For temperatures T and excitation energies ω in the range , , 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.