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Published on: August 17, 2017
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Confined antiskyrmion motion driven by electric current excitations.
Yao Guang1, Xichao Zhang2, Yizhou Liu3
1RIKEN Center for Emergent Matter Science (CEMS), Wako, Japan. yao.guang@riken.jp.
Nature Communications
|September 3, 2024
Summary
Antiskyrmions, complex topological spin textures, were observed moving within stripe domains under electrical current. Their velocity increased with current density and was enhanced by perpendicular current flow, offering spintronics insights.
Area of Science:
- Condensed Matter Physics
- Spintronics
- Materials Science
Background:
- Topological spin textures like skyrmions are crucial in spintronics.
- Antiskyrmions, the antiparticles of skyrmions, are less understood due to their complexity.
- Investigating antiskyrmion dynamics is key to advancing spintronic devices.
Purpose of the Study:
- To explore the current-driven dynamics of antiskyrmions.
- To investigate antiskyrmion behavior in fabricated microdevices.
- To understand the influence of current direction and density on antiskyrmion motion.
Main Methods:
- Fabrication of microdevices using (Fe0.63Ni0.3Pd0.07)3P, a known antiskyrmion host.
- In situ observation of antiskyrmion dynamics using Lorentz transmission electron microscopy.
- Micromagnetic simulations to complement experimental findings.
Main Results:
- Antiskyrmions exhibit directional motion confined within stripe domains.
- Antiskyrmion velocity is linearly dependent on current density, irrespective of current direction.
- Enhanced antiskyrmion mobility observed when current is perpendicular to stripe direction.
Conclusions:
- Demonstrated controlled motion of antiskyrmions using electrical currents.
- Provided insights into antiskyrmion dynamics, crucial for future spintronic applications.
- Highlighted the potential of antiskyrmions in next-generation electronic devices.
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