# Current-induced skyrmion motion on magnetic nanotubes

## TL;DR

This paper demonstrates through micromagnetic simulations that magnetic nanotubes enable stable, edge-effect-free skyrmion motion with a helical trajectory, potentially advancing skyrmion-based spintronic devices.

## Contribution

It introduces the concept of using magnetic nanotubes to eliminate edge effects in skyrmion motion, showing stable propagation under high current densities.

## Key findings

- Skyrmions move helically on nanotubes with velocity proportional to current density.
- Nanotube thickness increases skyrmion annular speed.
- Edge effects are suppressed, enabling high-current skyrmion stability.

## Abstract

Magnetic skyrmions are believed to be the promising candidate of information carriers in spintronics. However, the skyrmion Hall effect due to the nontrivial topology of skyrmions can induce a skyrmion accumulation or even annihilation at the edge of the devices, which hinders the real-world applications of skyrmions. In this work, we theoretically investigate the current-driven skyrmion motion on magnetic nanotubes which can be regarded as "edgeless" in the tangential direction. By performing micromagnetic simulations, we find that the skyrmion motion exhibits a helical trajectory on the nanotube, with its axial propagation velocity proportional to the current density. Interestingly, the skyrmion's annular speed increases with the increase of the thickness of the nanotube. A simple explanation is presented. Since the tube is edgeless for the tangential skyrmion motion, a stable skyrmion propagation can survive in the presence of a very large current density without any annihilation or accumulation. Our results provide a new route to overcome the edge effect in planar geometries.