Magnetic susceptibility and ${}^{27}\mathrm{Al}$ nuclear magnetic resonance data are reported for the non-Fermi-liquid (NFL) alloys ${\mathrm{U}}_{1-x}{\mathrm{La}}_x{\mathrm{Pd}}_2{\mathrm{Al}}_3,x=0.8$,0.9, and 1.0. Ten percent doping of the lanthanum sites with uranium impurities shifts the resonance frequency of ${}^{27}\mathrm{Al}$ nuclei near the U ions sufficiently such that satellite lines are resolved from the bulk line. The extra broadening of these satellite lines in ${\mathrm{U}}_{0.1}{\mathrm{La}}_{0.9}{\mathrm{Pd}}_2{\mathrm{Al}}_3$ is evidence for inhomogeneity in the magnetic susceptibility, and agrees with the NFL Kondo disorder model (KDM) and the Griffiths-McCoy phase model (GMPM) theories. However, the resulting distributions of characteristic energies do not extend down to zero, where uncompensated spins at finite temperatures would give rise to NFL behavior. This is evidence that the distribution of energies is not broad enough to be the cause of NFL behavior as described by the KDM and GMPM.

• Received 23 January 2005

DOI:https://doi.org/10.1103/PhysRevB.72.014423