DILUTION BEHAVIOR IN (CE-LA-Y)RU2SI2 (VOL 230, PG 220, 1997)

Specific heat and high-field magnetization measurements on Ce-x(LacY1- c)(1-x)Ru2Si2 (c = 1, 0.8, 0.65, 0.5, 0.35, 0) are presented. Kondo ty pe fluctuations are present in the whole (x, c) range of the ternary ( Ce-La-Y) Ru2Si2 system. From the evolution of the physical properties four regions are recognized on the borders of the ternary diagram: a n arrow La-rich (LacY1-c) antiferromagnetic region, a small Ce-rich area covering the whole c range where the alloys show a metamagnetic-like transition, a Y-rich region with IV characteristics and an extended (L acY1-c) and Ce-poor domain with the Ce Kondo impurity character.