Spin Dynamics in the f-electron non Fermi Liquid alloy Sc1-xUxPd3

ORAL

Abstract

We will discuss our recent inelastic neutron scattering experiments probing the spin dynamics in the non Fermi-liquid alloy, Sc$_{1-x}$U$_{x}$Pd$_{3}$. The increased homogeneity of U- sites in this system allows for an investigation of magnetism without the disordering effects of U-site clustering observed in isostructural Y$_{1-x}$U$_{x}$Pd$_{3}$. Spin dynamics indicative of the influence of a spin glass (SG) quantum critical point (QCP) in Sc$_{1-x}$U$_{x}$Pd$_{3}$ have been observed previously. Our current study probes spin fluctuations now doped away from this SG QCP and into the antiferromagnetic (AF) ordered phase of the system. The evolution of the spin excitations as the system is tuned across its phase diagram away from the SG QCP will be discussed, with particular emphasis given to the evolution of the localized spin fluctuations attributed to the QCP in this system.

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Authors

  • Stephen Wilson

    • University of Tennessee

  • Pengcheng Dai

    • University of Tennessee/ Oak Ridge National Lab
    • University of Tennessee
    • The University of Tennessee
    • University of Tennesse at Knoxville

  • D. Adroja

    • ISIS Rutherford Appleton Laboratory

  • Y. Qiu

    • NIST Center for Neutron Research

  • N.P. Butch

    • University of California, San Diego

  • M.B. Maple

    • University of California, San Diego