We report on transport measurements and mu SR data for the solid solution Y
b(NixCU1-x)(2)Si-2 (0 < x < 1) BY increasing,x, a crossover from an interme
diate valence regime to a magnetic Kondo lattice regime is observed. The ma
gnetic order develops above x = 0.125. (C) 1999 Published by Elsevier Scien
ce B.V. All rights reserved.