Confined antiskyrmion motion driven by electric current excitations.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39227610.
- Also identified by DOI 10.1038/s41467-024-52072-4 and PMC identifier 11371833.
- Licence recorded as CC BY-NC-ND.
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Abstract
Current-driven dynamics of topological spin textures, such as skyrmions and antiskyrmions, have garnered considerable attention in condensed matter physics and spintronics. As compared with skyrmions, the current-driven dynamics of their antiparticles - antiskyrmions - remain less explored due to the increased complexity of antiskyrmions. Here, we design and employ fabricated microdevices of a prototypical antiskyrmion host, (Fe<sub>0.63</sub>Ni<sub>0.3</sub>Pd<sub>0.07</sub>)<sub>3</sub>P, to allow in situ current application with Lorentz transmission electron microscopy observations. The experimental results and related micromagnetic simulations demonstrate current-driven antiskyrmion dynamics confined within stripe domains. Under nanosecond-long current pulses, antiskyrmions exhibit directional motion along the stripe regardless of the current direction, while the antiskyrmion velocity is linearly proportional to the current density. Significantly, the antiskyrmion mobility could be enhanced when the current flow is perpendicular to the stripe direction. Our findings provide novel and reliable insights on dynamical antiskyrmions and their potential implications on spintronics.