Coupling of skyrmions mediated by RKKY interaction
arXiv:1809.04165 · doi:10.1063/1.5062168
Abstract
A discussion on the interaction between skyrmions in a bi-layer system connected by a non-magnetic metal is presented. From considering a free charge carrier model, we have shown that the Ruderman-Kittel-Kasuya-Yosida (RKKY ) inter- action can induce attractive or repulsive interaction between the skyrmions depending on the spacer thickness. We have also shown that due to an increasing in RKKY energy when the skyrmions are far from each other, their widths are diminished. Finally, we have obtained analytical solutions to the skyrmion position when the in-plane distance between the skyrmions is small and it is shown that an attractive RKKY interaction yields a skyrmion precessory motion. This RKKY-induced coupling could be used as a skyrmion drag mechanism to displace skyrmions in multilayers.
5 Pages, 7 Figures
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- Skyrmion bound state and dynamics in an antiferromagnetic bilayer racetrack
- Motion-induced inertial effects and topological phase transitions in skyrmion transport
- Skyrmion-skyrmion interaction induced by itinerant electrons in a ferromagnetic strip
- Chiral spin structure of electron gas in systems with magnetic skyrmions