AI Article Synopsis
- Magnetic skyrmions are unique magnetic structures with potential uses in advanced technologies like spintronics, but traditional skyrmions face challenges such as the skyrmion Hall effect, which causes them to drift toward device edges and get destroyed.
- Recent research has demonstrated the stability and movement of antiferromagnetically coupled skyrmions in ferrimagnetic GdFeCo films, which could enhance their application potential.
- Using element-specific X-ray imaging, the study confirmed that these skyrmions can move at approximately 50 m/s with a reduced skyrmion Hall angle, suggesting promising avenues for future research in skyrmionic materials.
Article Abstract
Magnetic skyrmions are swirling magnetic textures with novel characteristics suitable for future spintronic and topological applications. Recent studies confirmed the room-temperature stabilization of skyrmions in ultrathin ferromagnets. However, such ferromagnetic skyrmions show an undesirable topological effect, the skyrmion Hall effect, which leads to their current-driven motion towards device edges, where skyrmions could easily be annihilated by topographic defects. Recent theoretical studies have predicted enhanced current-driven behavior for antiferromagnetically exchange-coupled skyrmions. Here we present the stabilization of these skyrmions and their current-driven dynamics in ferrimagnetic GdFeCo films. By utilizing element-specific X-ray imaging, we find that the skyrmions in the Gd and FeCo sublayers are antiferromagnetically exchange-coupled. We further confirm that ferrimagnetic skyrmions can move at a velocity of ~50 m s with reduced skyrmion Hall angle, |θ| ~ 20°. Our findings open the door to ferrimagnetic and antiferromagnetic skyrmionics while providing key experimental evidences of recent theoretical studies.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5840382 | PMC |
| http://dx.doi.org/10.1038/s41467-018-03378-7 | DOI Listing |
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