Various topological spin textures in a two-dimensional Heisenberg ferromagnet with dipole-dipole interactions

Yokota, Terufumi   

Magnetic skyrmions are known to exist in ferromagnetic films with dipole-dipole interactions. A two-dimensional Heisenberg ferromagnet with magnetic anisotropy and dipole-dipole interactions is investigated numerically. There exist various topological spin textures. Antiskyrmions coalesce to form spin textures with and , where is the topological number. Skyrmion molecules and antiskyrmion molecules as well as donut-shaped spin textures with appear. The appearance of these (meta)stable topological spin textures depends on the values of temperature and (or) external magnetic field.