Confined antiskyrmion motion driven by electric current excitations

Yao Guang (), Xichao Zhang, Yizhou Liu, Licong Peng, Fehmi Sami Yasin, Kosuke Karube, Daisuke Nakamura, Naoto Nagaosa, Yasujiro Taguchi, Masahito Mochizuki, Yoshinori Tokura and Xiuzhen Yu ()
Additional contact information
Yao Guang: RIKEN Center for Emergent Matter Science (CEMS)
Xichao Zhang: Waseda University
Yizhou Liu: RIKEN Center for Emergent Matter Science (CEMS)
Licong Peng: RIKEN Center for Emergent Matter Science (CEMS)
Fehmi Sami Yasin: RIKEN Center for Emergent Matter Science (CEMS)
Kosuke Karube: RIKEN Center for Emergent Matter Science (CEMS)
Daisuke Nakamura: RIKEN Center for Emergent Matter Science (CEMS)
Naoto Nagaosa: RIKEN Center for Emergent Matter Science (CEMS)
Yasujiro Taguchi: RIKEN Center for Emergent Matter Science (CEMS)
Masahito Mochizuki: Waseda University
Yoshinori Tokura: RIKEN Center for Emergent Matter Science (CEMS)
Xiuzhen Yu: RIKEN Center for Emergent Matter Science (CEMS)

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: 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, (Fe0.63Ni0.3Pd0.07)3P, 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.

Date: 2024
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DOI: 10.1038/s41467-024-52072-4

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