# Collective magnetization dynamics in nano-arrays of thin FePd discs

## TL;DR

This study investigates the collective magnetization dynamics in nano-arrays of FePd discs, revealing how inter-disc interactions depend on temperature and magnetic field direction through experiments and simulations.

## Contribution

It provides a combined experimental and micromagnetic simulation analysis of magnetization dynamics in FePd disc arrays, highlighting the effects of inter-disc interactions.

## Key findings

- Spectra show features from disc interactions influenced by temperature and field direction.
- Qualitative agreement between experimental spectra and micromagnetic simulations.
- Mode profiles confirm the origin of spectral features from inter-disc interactions.

## Abstract

We report on the magnetization dynamics of a square array of mesoscopic discs, fabricated from an iron palladium alloy film. The dynamics properties were explored using ferromagnetic resonance measurements and micromagnetic simulations. The obtained spectra exhibit features resulting from the interactions between the discs, with a clear dependence on both temperature and the direction of the externally applied field. We demonstrate a qualitative agreement between the measured and calculated spectra. Furthermore, we calculated the mode profiles of the standing spin waves excited during a time-dependent magnetic field excitations. The resulting maps confirm that the features appearing in the ferromagnetic resonance absorption spectra originate from the temperature and directional dependent inter-disc interactions.