Micromagnetic simulation of Fe asymmetric nanorings

► We report that the existence of asymmetry strongly influences the coercivity and the remanence. ► Magnetization reversal is driven by the nucleation of a C state and propagation of a vortex state. ► We also conclude that the lack of a core contributes to the stability of the vortex state. ► Asymmetry can be useful for tailoring specific magnetic characteristics of these systems.