Paramagnetic scattering from a cubic ferromagnetPd2MnSn

Paramagnetic neutron scattering from the localized, metallic ferromagnet ${\mathrm{Pd}}_2$MnSn is characterized for the entire range of energy and momentum (ω,Q) space for a temperature range between $T_c$ (193 K) and room temperature. The scattering function S(Q,ω) can be well described by a simple double Lorentzian form S(Q,ω)∝T[1/(${\kappa }_1^2$+$q^2$) ]${\Lambda }_1$ $q^2$/[(${\Lambda }_1$ $q^2$ ${)}^2$ +${\omega }^2$] where, for larger q, the $q^2$ dependence in both Lorentzian factors changes over to a more general functional form. These results are in marked contrast to the case of the cubic, insulating ferromagnet EuO. This study reinforces our current interpretation of the constant-energy ridges which have also been observed in Ni.