Synchronization of chiral vortex nano-oscillators

TL;DR

This paper introduces a novel spintronic oscillator based on chiral vortex structures in magnetic films, demonstrating synchronization and potential for neuromorphic computing applications.

Contribution

It proposes a new chiral vortex-based spintronic oscillator and demonstrates its synchronization and application in neuromorphic computing through micromagnetic simulations.

Findings

Oscillators exhibit stable vortex-like magnetic structures.

Synchronization achieved among multiple oscillators at different frequencies.

Potential application demonstrated in neuromorphic computing networks.

Abstract

The development of spintronic oscillators is driven by their potential applications in radio frequency telecommunication and neuromorphic computing. In this work, we propose a spintronic oscillator based on the chiral coupling in thin magnetic films with patterned anisotropy. With an in-plane magnetized disk imprinted on an out-of-plane magnetized slab, the oscillator takes a polar vortex-like magnetic structure in the disk stabilized by a strong Dzyaloshinskii-Moriya interaction. By means of micromagnetic simulations, we investigate its oscillatory properties under applied spin current and, by placing an ensemble of oscillators in the near vicinity, we demonstrate their synchronization with different resonant frequencies. Finally, we show their potential application in neuromorphic computing using a network with six oscillators.