Angular Dependent Magnetization Dynamics with Mirror-symmetric Excitations in Artificial Quasicrystalline Nanomagnet Lattices

TL;DR

This study investigates how spin-wave spectra in quasicrystalline nanomagnet lattices depend on the angle of applied magnetic fields, revealing reprogrammable magnonic behaviors linked to mirror symmetries.

Contribution

It introduces angle-dependent spin-wave spectroscopy in aperiodic quasicrystalline magnetic lattices and links spectral features to mode symmetries, advancing understanding of reprogrammable magnonics.

Findings

Distinct angular dependencies of resonances identified

Micromagnetic simulations link modes to mirror symmetries

Reprogrammable spin wave modes observed during reversal

Abstract

We report angle-dependent spin-wave spectroscopy on aperiodic quasicrystalline magnetic lattices, i.e., Ammann, Penrose P2 and P3 lattices made of large arrays of interconnected Ni$_{80}$Fe$_{20}$ nanobars. Spin-wave spectra obtained in the nearly saturated state contain distinct sets of resonances with characteristic angular dependencies for applied in-plane magnetic fields. Micromagnetic simulations allow us to attribute detected resonances to mode profiles with specific mirror symmetries. Spectra in the reversal regime show systematic emergence and disappearance of spin wave modes indicating reprogrammable magnonic characteristics.