Current-driven coherent magnetic skyrmion generation

The next-generation logic and memory devices which use magnetic skyrmions as the information carrier are frequently studied due to its remarkable magnetic stability, extremely compact size and very-low-cost driving force within the nanostructure. To realize skyrmion-based spintronic devices, it is essential to understand the dynamics of skyrmion generation. In this study, we have carried out a systematic theoretical study on coherent magnetic skyrmion generation by an anti-notch in a channel of finite width. We found that, the coherent skyrmion generation is crucially effected by both damping (α) and nonadiabaticity (β) parameters, as well as the geometry of the anti-notch. The periodicity of the generation is also investigated for certain current densities and α/β ratios. We anticipate that our predictions provide rational basis for skyrmion-based devices in which skyrmions are used as information carriers.