Guiding of dynamic skyrmions using chiral magnetic domain wall
Moojune Song, Kyoung‐Woong Moon, Seungmo Yang, Chanyong Hwang, Kab‐Jin Kim
Abstract
Magnetic skyrmions are expected to offer novel functionalities in emerging magnetic devices. However, when the skyrmion moves along a nanotrack, its trajectory is generally curved by the skyrmion Hall effect, resulting in an annihilation of skyrmion at the edge. Here we propose a method to avoid this edge-induced skyrmion annihilation. We found that the annihilation of skyrmion is largely suppressed when we replace the conventional edge with a chiral domain wall boundary, due to topological repulsion. We also provide device architectures that enable the guiding, sorting and size-tuning of multiple skyrmions, which could be potentially useful for future skyrmion devices.