Magnetic spectral response in the intermetallic compound CeSn3

Neutron-inelastic-scattering measurements on Ce${\mathrm{Sn}}_3$ performed with high-incident-energy neutrons reveal a broad inelastic hump centered around 40 meV at low temperatures, in addition to the usual quasi-elastic spectrum centered on zero energy. With increasing temperature, the inelastic hump broadens and "melts away," such that around the temperature of the maximum in the susceptibility (∼130 K) no observable trace of its presence remains and the full magnetic response can be described by a single quasielastic spectrum.