  Motivated by recent experimental polarized neutron results, we present a
numerical micromagnetic study of the interfacial (intergrain)
Dzyaloshinskii-Moriya interaction (DMI) in nanocrystalline terbium. We
demonstrate that the DMI-induced spin misalignment between adjacent nanograins
is the reason for the formation of the asymmetric positive-negative pattern
seen in polarized neutron scattering experiments. Analysis of the
remagnetization process suggests the generic impact of the DMI on the
macroscopic magnetic parameters of polycrystalline defect-rich materials.
