Changes in non-Fermi liquid behavior with annealing due to lattice   disorder in UCu_4Pd
  The magnetic and electronic properties of non-Fermi liquid UCu_4Pd depend on annealing conditions. Local structural changes due to this annealing are reported from U L_III- and Pd K-edge x-ray absorption fine-structure measurements. In particular, annealing decreases the fraction of Pd atoms on nominally Cu 16e sites and the U-Cu pair-distance distribution width. This study provides quantitative information on the amount of disorder in UCu_4Pd and allows an assessment of its possible importance to the observed non-Fermi liquid behavior. 
C. H. Booth, E.-W. Scheidt, U. Killer, A. Weber, S. Kehrein