Large non-collinearity and spin-reorientation in the novel Mn$_{2}$RhSn Heusler magnet

Heusler compounds is a large class of materials, which exhibits diverse fundamental phenomena, together with the possibility of their specific tailoring for various engineering tasks. Present work discusses the magnetic noncollinearity in the family of noncentrosymmetric Mn$_{2}$-based Heusler compounds. According to the experimental and theoretical results, Mn$_{2}$\textit{YZ} Heusler family is suspected to provide promising candidates for the formation of the skyrmion lattice. The work is focused on Mn$_{2}$RhSn bulk polycrystalline sample, which serves as a prototype. It crystallizes in the tetragonal noncentrosymmetric structure (No. 119,\textit{I-4m2}), which enables the anisotropic DM coupling. Additional short-range modulation, induced by the competing nearest and next-nearest interplanes Heisenberg exchange, is suppressed above the 80 K. This allows to develop the long-range modulations in the ideal ferrimagnetic structure within the \textit{ab} crystallographic planes.