NON-FERMI-LIQUID, MAGNETIC, AND KONDO BEHAVIOR IN THE HEAVY-FERMION SYSTEM -LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-10)

Results of specific heat, magnetic susceptibility, magnetization, and electrical resistivity for the heavy fermion alloy system U2Cu17-xAlx (5 less than or equal to x less than or equal to 10) are presented. Th e nonmagnetic alloy U2Cu12Al5 exhibits non-Fermi-liquid characteristic s at low temperatures: p proportional to T and C/T proportional to lnT . These non-Fermi-liquid characteristics also persist for other alloys corresponding to x>5, which are all weakly magnetic. This magnetic be havior is revealed by a maximum in zero-field-cooled chi, a discrepanc y between zero-field-cooled and field-cooled chi below this maximum, a nd a corresponding shoulder in C/T. The transition temperature identif ied by the shoulder in C/T is largest for x=8 (about 2.5 K) and decrea ses monotonically for either increasing or decreasing x.