Magnetic skyrmions are promising as next-generation information units. Their antiparticle-the antiskyrmion-has also been discovered in chiral magnets. Here we experimentally demonstrate antiskyrmion sliding in response to a pulsed electric current at room temperature without the requirement of an external magnetic field. This is realized by embedding antiskyrmions in helical stripe domains, which naturally provide one-dimensional straight tracks along which antiskyrmion sliding can be easily launched with low current density and without transverse deflection from the antiskyrmion Hall effect. The higher mobility of the antiskyrmions in the background of helical stripes in contrast to the typical ferromagnetic state is a result of intrinsic material parameters and elastic energy of the stripe domain, thereby smearing out the random pinning potential, as supported by micromagnetic simulations. The demonstration and comprehensive understanding of antiskyrmion movement along naturally straight tracks offers a new perspective for (anti)skyrmion application in spintronics. Electric current pulses are used to move antiskyrmions, by coupling them with a helical track.

The topological (anti)skyrmion configurations have presented promise for versatile spintronic applications in racetrack memory, logic gates, and bio-inspired computing due to the nontrivial spin topology and convenient current-driven dynamics. However, the precise control of (anti)skyrmion-based information unit transportation via electric current in conquer of skyrmion Hall effect remains challenging especially in ferromagnetic films, limiting their integration into spintronic devices. In this study, we demonstrate the density, velocity, and direction control of half-skyrmion, with a topological charge of 1/2, in a predictable and governable way under the stimuli of electric current in Pt/Co/Ta multilayers. The particular nonsymmetric configuration of half-skyrmion introduces variable competing forces under joint manipulation of magnetic field and electric current. Thereby, the half-skyrmion application with highly controllable dynamic behavior is further proposed in prototype devices such as half-skyrmionic racetrack memory device with parallelized operation, programmable logic devices, and neuromorphic computing artificial synapses. This work sheds light on the versatile spintronic applications of half-skyrmions through electromagnetic coordinated manipulation.

Topologically 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 D 2d / S 4 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 Mn 1.4 PtSn with D 2d 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.

A magnetic skyrmion is a particle-like spin swirling object with a nontrivial topology that holds great promise for next-generation information carriers in high-performance spintronic devices. It was discovered in a chiral magnet, MnSi with B20 structure, in 2009 and later confirmed as a common feature of magnetic compounds with Dzyaloshinsky-Moriya interaction (DMI). In this work, we provide fundamental insight into the magnetic properties of skyrmion-hosting materials originating from DMI. The relationship between the point groups of the materials and DMI is introduced; then, the common features of magnetic skyrmions experimentally verified in the magnetization and magnetotransport measurements are highlighted. Finally, other particle-like magnetic configurations in chiral magnets and the crossover with a superconductor are discussed.