Magnetization dynamics in a three-dimensional interconnected nanowire array

TL;DR

This study uses micromagnetic simulations to analyze high-frequency magnetization dynamics in a 3D cubic array of interconnected nanowires, revealing resonance behaviors linked to geometry and configuration, with implications for tunable magnonic devices.

Contribution

It provides the first detailed simulation-based analysis of high-frequency dynamics in interconnected nanowire arrays, highlighting their potential for reprogrammable magnonic applications.

Findings

Resonances occur at specific frequencies related to geometric features.

The absorption spectrum depends on geometry and magnetic configuration.

Results suggest potential for tunable and reprogrammable magnonic devices.

Abstract

Three-dimensional magnetic nanostructures have recently emerged as artificial magnetic material types with unique properties bearing potential for applications, including magnonic devices. Interconnected magnetic nanowires are a sub-category within this class of materials that is attracting particular interest. We investigate the high-frequency magnetization dynamics in a cubic array of cylindrical magnetic nanowires through micromagnetic simulations based on a frequency-domain formulation of the linearized Landau-Lifshitz-Gilbert equation. The small-angle high-frequency magnetization dynamics excited by an external oscillatory field displays clear resonances at distinct frequencies. These resonances are identified as oscillations connected to specific geometric features and micromagnetic configurations. The geometry- and configuration-dependence of the nanowire array's absorption spectrum demonstrates the potential of such magnetic systems for tuneable and reprogrammable magnonic applications.