Diverse dynamics in interacting vortices systems through tunable conservative and non-conservative coupling strengths

TL;DR

This paper develops an analytical model for coupled magnetic vortices, revealing how conservative and non-conservative forces influence their complex dynamics, validated by simulations and experiments, with implications for neuromorphic computing.

Contribution

The study introduces a new analytical model for vortex dynamics that incorporates both conservative and non-conservative forces, validated by simulations and experiments, advancing control in vortex-based systems.

Findings

Model accurately predicts vortex dynamic states.

External fields and currents can control vortex behavior.

System demonstrates potential for reservoir computing applications.

Abstract

Magnetic vortices are highly tunable, nonlinear systems with ideal properties for being applied in spin wave emission, data storage, and neuromorphic computing. However, their technological application is impaired by a limited understanding of non conservative forces, that results in the open challenge of attaining precise control over vortex dynamics in coupled vortex systems. Here, we present an analytical model for the gyrotropic dynamics of coupled magnetic vortices within nano pillar structures, revealing how conservative and non conservative forces dictate their complex behavior. Validated by micromagnetic simulations, our model accurately predicts dynamic states, controllable through external current and magnetic field adjustments. The experimental verification in a fabricated nano pillar device aligns with our predictions, and it showcases the system's adaptability in dynamical coupling. The unique dynamical states, combined with the system's tunability and inherent memory, make it an exemplary foundation for reservoir computing. This positions our discovery at the forefront of utilizing magnetic vortex dynamics for innovative computing solutions, marking a leap towards efficient data processing technologies.