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.
*Work at the Ames Laboratory was supported by the Department of Energy, Basic Energy Sciences under Contract No. DE-AC02-07CH11358. Measurements at the Spallation Neutron Source at ORNL are sponsored by the User Facilities division of DOE BES.
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Presenters
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Benjamin G Ueland
- Ames Laboratory
- Ames Lab