Susceptibility inhomogeneity and non-Fermi liquid behavior in nominally ordered UCu4Pd
Abstract
Muon spin rotation experiments on a stoichiometric sample of the non-Fermi liquid (NFL) heavy-fermion compound UCu4Pd, in which recent neutron Bragg scattering measurements are consistent with an ordered structure, indicate that the U-ion susceptibility is strongly inhomogeneous at low temperatures. This suggests that residual disorder dominates NFL behavior. The data also indicate a short correlation length ( 1 lattice spacing) for this inhomogeneity and a rapid low-temperature U-moment relaxation rate ( 1012 s-1), which constrain cluster-based models of NFL behavior.
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