Accelerating, guiding, and compressing skyrmions by defect rails

TL;DR

This paper presents a new method using defect rails to accelerate, guide, and compress magnetic skyrmions, enhancing their potential for information transport in spintronic devices.

Contribution

Introduction of a defect rail platform that significantly increases skyrmion speed and control for improved data transmission in spintronics.

Findings

Skyrmion speed increased up to ten times with defect rails.

The distance between rails can be as small as the skyrmion's initial radius.

The platform enables more efficient and controlled skyrmion transport.

Abstract

Magnetic skyrmions are promising candidates as information carriers in spintronic devices. The transport of individual skyrmions in a fast and controlled way is a key issue in this field. Here we introduce a novel platform for accelerating, guiding and compressing skyrmions along predefined paths. The guiding mechanism is based on two parallel defect-lines (rails), one attractive and the other repulsive. Numerical simulations, using parameters from state-of-the-art experiments, show that the speed of the skyrmions along the rails is increased up to a factor of ten with respect to the non-defect case whereas the distance between rails can be as small as the initial radius of the skyrmions. In this way, the flux of information that can be coded and transported with magnetic skyrmions could be significantly increased.