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Well-defined paramagnons in YCo<sub>2</sub>

ORAL

Abstract

Cubic YCo2 is an exchanged-enhanced metallic paramagnet on the verge of ferromagnetic order. In such itinerant magnets, competition between magnetic states can be seen in the magnetic excitation spectrum.  Here we present results from inelastic neutron scattering, diffraction, and thermodynamic measurements on YCo2.  We find steep well-defined over-damped magnetic excitations centered at the Γ point of the Brillouin zone which extend past 100 meV.  The excitations weaken with increasing temperature but exist up to at least 300 K. We will discuss the excitations in terms of the compound's itinerant ferromagnetism and proximity to ferromagnetic order.

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Presenters

  • Benjamin G Ueland

    Ames Laboratory, Ames Lab

Authors

  • Benjamin G Ueland

    Ames Laboratory, Ames Lab

  • Bing Li

    Ames Laboratory and Iowa State University, Iowa State University

  • Robert J McQueeney

    Ames Laboratory and Iowa State University, Iowa State University, Ames Laboratory

  • Garrett E Granroth

    Oak Ridge National Laboratory, Oak Ridge National Lab

  • Xiaoping Wang

    Oak Ridge National Lab, Oak Ridge National Laboratory

  • Alannah M Hallas

    University of British Columbia

  • Shiming Lei

    Princeton University, Rice University, Rice Univ

  • Chien-Lung Huang

    Rice University

  • Emilia Morosan

    Rice Univ, Rice University

  • V. Smetana

    Stockholm University, Department of Materials and Environmental Chemistry, Stockholm University, Sweden, Stockholm University, Svante Arrhenius väg 16 C, 106 91 Stockholm, Sweden

  • Anja-verena Mudring

    Stockholm University, Department of Materials and Environmental Chemistry, Stockholm University, Sweden