Transportation of Topological Spin Textures at Material Boundaries

We examine the dynamics of topological spin textures, magnetic skyrmions and skyrmionium, at the boundaries where material properties vary. Using skyrmions or skyrmionium as information storage, e.g race track memory, requires a basis of knowledge on how these topological spin structures react to changes in material parameters. Using micromagnetic simulations, we investigated the dependence of radius and Hall angle due to: exchange stiffness, magnetic saturation, Dzyaloshinskii–Moriya Interaction, damping constant, anisotropy, and non-adiabaticity of spin transfer torque. There is also a comparison made between the feasibility of skyrmionium as an alternative to skyrmions as a method of storing and transportation information.