Abstract and subjects
The effect of geometrical frustration on the development of the heavy-fermion state and quantum criticality is studied in UAuCu4, UAuPt4, UAu3Ni2 samples through measurements of their magnetic susceptibility, heat capacity, and electrical resistivity. In addition, since lattice disorder can play a large role in defining magnetic properties in frustrated systems, extended X-ray absorption fine structure (EXAFS) data have also been obtained. The local structure results show a strong correlation with the magnetic properties in these samples.