Susceptibility inhomogeneity and non-Fermi-liquid behavior in nominally orderedUCu4Pd Academic Article uri icon

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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.

authors

  • MacLaughlin, DE
  • Heffner, RH
  • Nieuwenhuys, GJ
  • Luke, Graeme
  • Fudamoto, Y
  • Uemura, YJ
  • Chau, R
  • Maple, MB
  • Andraka, B

publication date

  • November 1, 1998