Memory functions of magnetic skyrmions

TL;DR

This paper explores the fundamental memory-related functions of magnetic skyrmions, highlighting their potential for high-density, energy-efficient data storage and manipulation based on numerical simulations of their dynamics.

Contribution

It demonstrates the elementary functions of skyrmions through numerical simulations, providing insights for designing skyrmionic memory devices.

Findings

Skyrmions are nano-scale, topologically stable spin textures.

They can be manipulated with ultra-low current and energy.

Numerical simulations reveal their potential for memory applications.

Abstract

Magnetic skyrmion, a swirling spin texture, in chiral magnets is characterized by (i) nano-scale size ($\sim$1nm -- 100nm), (ii) topological stability, and (iii) gyro-dynamics. These features are shown to be advantageous for (a) high-density data-storage, (b) nonvolatile memory, and (c) ultra-low current and energy cost manipulation, respectively. By the numerical simulations of Landau-Lifshitz-Gilbert equation, the elementary functions of skyrmions are demonstrated aiming at the design principles of skyrmionic memory devices.