Neutron scattering study of MnSi proving no ‘‘exchange hole’’

Abstract

Neutron scattering experiments have been performed on MnSi below T_C with the double‐axis powder scattering technique using unpolarized neutrons, and also with the polarization analysis technique. The magnetic scattering intensity has not shown any anomaly around q=0.5 Å⁻¹, in contrast to the previous results of Ziebeck et al. who found a large intensity peak at this momentum transfer. Thus, the hypothesis of Ziebeck et al. of observing an ‘‘exchange hole’’ is excluded.