Structural properties of new chiral-polar magnets

Chiral magnets have attracted considrable attention in recent years, since the Dzyaloshinskii Moriya (DM) interactions allowed by the lattice chirality could induce various chiral magnetic structures. However, chiral magnets do not necessarily exhibit chiral magnetic structures. For example, the chiral magnet Ni₃TeO₆ exhibits an achiral collinear antiferromagnetic structure below 52 K. Exploring the new methods that could turn the collinear magnetic structure into chiral magnetic structure in chiral magnets is crucial for studying the exotic chiral physics in this family of materials. We synthesized high quality single crystals and powder samples of Mn or Co-substituted Ni₃TeO₆. In this talk, we will discuss our recent neutron scattering results of Mn or Co-substituted Ni₃TeO₆. Our resutls show that an incommensurate helical magnetic structure with spins aligned in the ab plane is induced by Mn or Co substitution. The results obtained from our polarized neutron diffraction experiments show clear magnetic chirality in the magnetic structure. Our results suggest that chemical substitution is an efficient method for creating chiral magnetic structures in chiral magnets.