THERMODYNAMIC AND TRANSPORT-PROPERTIES OF (CEXGD1-X)CU6 FOR 0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-1

Results are reported for the properties of the pseudobinary alloys between the heavy-fermion compound CeCu6 and the frustrated antiferromagnet GdCu6. Evidence is provided for a rapid onset of Kondo behavior in the resistivity for small Ce substitutions in GdCu6, the persistence of signs of Kondo coherence for significant substitutions of Gd in CeCu6, and evolution through some type of spin-glass or spin-density-wave magnetic freezing to local-moment magnetism as the Gd content increases from 10% to 90%. An interesting possibility exists that in the Ce-rich concentration regime the freezing is the stabilization of some type of spin-density wave in the Ce magnetization, as produced by Au on the Cu sites or in the yttrium conduction band by Gd substitutions in pure Y. As in the resistivity, Gd moment contributions and Kondo (Ce) contributions seem to be independent and additive in the entropy.