Engineering Topological Spin Textures in Kagome Magnet

The RMn6Sn6 family (R = rare earth element) has attracted significant interest due to its complex magnetic textures and topological states, which are highly dependent on the choice of the R atom. For instance, TbMn6Sn6 hosts bi-skyrmions near its spin reorientation temperature, where the fluctuation driven competition between Mn's in-plane anisotropy and Tb's uniaxial anisotropy leads to a spin reorientation transition temperature below the Curie temperature. We have been able to create spin re-orientation in more than one RMn6Sn6 compound via chemical substitution and in one of them we have been able to engineer skyrmionic bubbles. In this talk we will present our efforts in engineering such spin textures and their real space structure observed using Lorentz transmission electron microscopy.