Susceptibility Inhomogeneity and Non-Fermi-Liquid Behavior in Ce(Ru0.5Rh0.5)2Si2
Abstract
Magnetic susceptibility and muon spin rotation (μSR) experiments have been carried out to study the effect of structural disorder on the non-Fermi-liquid (NFL) behavior of the heavy-fermion alloy Ce(Ru0.5Rh0.5)2Si2. Analysis of the bulk susceptibility in the framework of disorder-driven Griffiths-phase and Kondo-disorder models for NFL behavior yields relatively narrow distributions of characteristic spin fluctuation energies, in agreement with μSR linewidths that give the inhomogeneous spread in susceptibility. μSR and NMR data both indicate that disorder explains the "nearly NFL" behavior observed above 2 K, but does not dominate the NFL physics found at low temperatures and low magnetic fields.
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