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.
@article{arxiv.cond-mat/0210275,
title = {Changes in non-Fermi liquid behavior with annealing due to lattice disorder in UCu_4Pd},
author = {C. H. Booth and E. -W. Scheidt and U. Killer and A. Weber and S. Kehrein},
journal= {arXiv preprint arXiv:cond-mat/0210275},
year = {2007}
}