Polarized-neutron study of the paramagnetic scattering fromCeCu2Si2

Polarized-neutron scattering techniques have been used to study the paramagnetic scattering from ${\mathrm{CeCu}}_2$ ${\mathrm{Si}}_2$. The paramagnetic scattering consists of a quasielastic line and a smaller inelastic peak at approximately 32 meV. These peak positions are in agreement with the results obtained in time-of-flight measurements on ${\mathrm{CeCu}}_2$ ${\mathrm{Si}}_2$ by Horn et al.; we find, however, that the observed paramagnetic scattering is consistent with that expected from bulk susceptibility measurements, in contradiction with the conclusion drawn by Horn et al. The general features of the paramagnetic scattering from ${\mathrm{CeCu}}_2$ ${\mathrm{Si}}_2$ are different from those observed in ${\mathrm{UPt}}_3$ and ${\mathrm{UBe}}_{13}$. In particular, the linewidth of the quasielastic line in ${\mathrm{CeCu}}_2$ ${\mathrm{Si}}_2$ is almost an order of magnitude smaller than in the uranium compounds.