Abstract
Magnetic, transport, and thermal properties of are investigated to elucidate the lack of magnetic order in this heavy-fermion compound with a specific heat value, J/mol and robust effective magnetic moments (). The lack of magnetic order is attributed to magnetic frustration favored by the hexagonal configuration of the Ce sublattice. In fact, the effect of magnetic field on and residual resistivity does not correspond to that of a Fermi liquid (FL) because a broad anomaly appears at K in , without changing its position up to T. However, the flattening of and its magnetic susceptibility , together with the dependence of , reveal a FL behavior for K which is also supported by Wilson and Kadowaki-Woods ratios. The unusual coexistence of FL and frustration phenomena can be understood by placing paramagnetic in an intermediate section of a frustration-Kondo model. The entropy, , reaches at K, with a tendency to approach the expected value of the ground state of .
- Received 6 December 2016
DOI:https://doi.org/10.1103/PhysRevB.95.115146
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