Channeling Skyrmions: suppressing the skyrmion Hall effect in ferrimagnetic nanostripes

TL;DR

This paper investigates how to suppress the skyrmion Hall effect in ferrimagnetic nanostripes by designing a magnetic channel device and controlling current protocols, enabling precise skyrmion movement for potential technological applications.

Contribution

The study introduces a novel design strategy for a magnetic channel device that controls skyrmion trajectories and suppresses the Hall effect in ferrimagnetic nanostripes.

Findings

Successful control of skyrmion movement using current protocols.

Proposed device design suppresses the skyrmion Hall effect.

Adjusting current strength shifts skyrmions between channels.

Abstract

The Skyrmion Hall Effect (SkHE) observed in ferromagnetic (FM) and ferrimagnetic (FI) skyrmions traveling due to a spin-polarized current can be a problematic issue when it comes to technological applications. By investigating the properties of FI skyrmions in racetracks through computational simulations, we have described the nature of their movement based on the relative values of the exchange, Dzyaloshinskii-Moriya, and anisotropy coupling constants. Beyond that, using a design strategy, a magnetic channel-like nano-device is proposed in which a spin-polarized current protocol is created to successfully control the channel on which the skyrmion will travel without the adverse SkHE. Additionally, a simple adjustment in the current strength can modify the skyrmion position sideways between different parallel channels in the nanostripe.