Disappearance of magnetic moments in CePd1-xNixAl

We present the chemical pressure effect on the specific heat and magnetic s usceptibility in the substituted system CePd1-xNixAl. By substitution of 10 % of Ni, T-N has almost disappeared. Further substitution of Ni drastically diminishes the magnetic moment and the effective number of Bohr magnetons. The entropy integrated up to 10 K is 66% for CePdAl, and it decreases to 3 % of Rln 2 with increasing x. The electronic specific-heat coefficient C/T approaches 1.1 J/mol K-2 for CePd0.9Ni0.1 Al at low temperatures. Single cr ystals for x = 0.0 and 0.1 have been grown to investigate the magnetic anis otropy. (C) 2000 Elsevier Science B.V. All rights reserved.