Susceptibility inhomogeneity and non-Fermi-liquid behavior in nominally ordered <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">UCu</mi></mrow><mrow><mn>4</mn></mrow></msub></mrow><mi mathvariant="normal">Pd</mi></math></span>

D. E. MacLaughlin; R. H. Heffner; G. J. Nieuwenhuys; G. M. Luke; Y. Fudamoto; Y. J. Uemura; R. Chau; M. B. Maple; B. Andraka

doi:10.1103/PhysRevB.58.R11849

Rapid Communication

Susceptibility inhomogeneity and non-Fermi-liquid behavior in nominally ordered ${UCu}_{4} Pd$

D. E. MacLaughlin, R. H. Heffner, G. J. Nieuwenhuys, G. M. Luke, Y. Fudamoto, Y. J. Uemura, R. Chau, M. B. Maple, and B. Andraka

Phys. Rev. B 58, R11849(R) – Published 1 November 1998

Abstract

Muon spin rotation experiments on a stoichiometric sample of the non-Fermi-liquid (NFL) heavy-fermion compound ${UCu}_{4} Pd,$ in which recent neutron scattering experiments suggest an ordered structure, indicate that the U-ion susceptibility is strongly inhomogeneous at low temperatures. We argue that this is due to residual disorder, which also dominates NFL behavior. The data yield a short correlation length ( $≲ 1$ lattice spacing) and a rapid low-temperature U-moment relaxation rate $(≳ 10^{12} s^{- 1}),$ which constrain cluster-based models of NFL behavior.

Received 30 April 1998

DOI:https://doi.org/10.1103/PhysRevB.58.R11849

Authors & Affiliations

D. E. MacLaughlin

MS K764, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
Department of Physics, University of California, Riverside, California 92521-0413

R. H. Heffner