Visualizing Emergent Magnetic Flux of Antiskyrmions in Mn1.4PtSn Magnet

Abstract

AbstractTopologically protected spin textures, such as magnetic skyrmions, have attracted considerable attention owing to their emergent electromagnetic phenomena and potential applications in spintronics. The antiskyrmion, a new member of the skyrmion family in the nanoscale dimension, consists of alternating Néel‐ and Bloch‐type boundary walls; it has already been discovered in non‐centrosymmetric magnets with D2d/S4 symmetry. However, its complex spin textures and unique magnetic‐charge‐induced emergent field have not been explicitly visualized thus far. Here, state‐of‐the‐art off‐axis electron holography is employed to directly resolve the antiskyrmions in a non‐centrosymmetric Heusler magnet Mn1.4PtSn with D2d symmetry. The magnetic flux distribution inside and outside the antiskyrmion is clearly imaged, indicating the emergent magnetic field induced by the broken cylindrical symmetry. More importantly, the closed emergent flux between adjacent antiskyrmions is revealed, indicating the antiskyrmion‐antiskyrmion interactions (a different mechanism compared to that of conventional skyrmions). These findings provide a clear and deep insight into the intrinsic magnetic flux configuration in the antiskyrmion‐hosted magnets, thus paving the way for the manipulation of antiskyrmions in the future.