  We report a Determinant Quantum Monte Carlo investigation which quantifies
the behavior of the susceptibility and the entropy in the framework of the
periodic Anderson model (PAM), focussing on the evolution with different degree
of conduction electron (c) -local moment (f) hybridization. These results
capture the behavior observed in several experiments, including the universal
behavior of the NMR Knight shift anomaly below the crossover temperature,
$T^{\ast}$. We find that $T^{\ast}$ is a measure of the onset of c-f
correlations and grows with increasing hybridization. These results suggest
that the NMR Knight shift and spin-lattice relaxation rate measurements in
non-Fermi liquid materials are strongly influenced by temperature-dependent
hybridization processes. Our results provide a microscopic basis for the
phenomenological two-fluid model of Kondo lattice behavior, and its evolution
with pressure and temperature.
