Susceptibility inhomogeneity and non-Fermi liquid behavior in nominally ordered UCu_4Pd

Abstract

Muon spin rotation experiments on a stoichiometric sample of the non-Fermi liquid (NFL) heavy-fermion compound UCu_4Pd, 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 (\lesssim 1 lattice spacing) for this inhomogeneity and a rapid low-temperature U-moment relaxation rate (\gtrsim 10^{12} s^{-1}), which constrain cluster-based models of NFL behavior.

4 pages, 4 eps figures, REVTeX

References in corpus (2)

• Non-Fermi liquid behavior and Griffiths phase in {\it f}-electron compounds
• Disorder-driven non-Fermi liquid behavior in Kondo alloys

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