Control of spin dynamics in artificial honeycomb spin-ice-based nanodisks

Mojtaba Taghipour Kaffash, Wonbae Bang, Sergi Lendinez, Axel Hoffmann, John B. Ketterson, M. Benjamin Jungfleisch*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

We report the experimental and theoretical characterization of the angular-dependent spin dynamics in arrays of ferromagnetic nanodisks arranged on a honeycomb lattice. The magnetic field and microwave frequency dependence, measured by broadband ferromagnetic resonance, reveal a rich spectrum of modes that is strongly affected by the microstate of the network. Based on symmetry arguments with respect to the external field, we show that certain parts of the ferromagnetic network contribute to the detected signal. A comparison of the experimental data with micromagnetic simulations reveals that different subsections of the lattice predominantly contribute to the high-frequency response of the array. This is confirmed by optical characterizations using microfocused Brillouin light scattering. Furthermore, we find indications that nucleation and annihilation of vortexlike magnetization configurations in the low-field range affect the dynamics, which is different from clusters of ferromagnetic nanoellipses. Our work opens up new perspectives for designing magnonic devices that combine geometric frustration in gyrotropic vortex crystals at low frequencies with magnonic crystals at high frequencies.

Original languageEnglish (US)
Article number174424
JournalPhysical Review B
Volume101
Issue number17
DOIs
StatePublished - May 1 2020

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Taghipour Kaffash, M., Bang, W., Lendinez, S., Hoffmann, A., Ketterson, J. B., & Jungfleisch, M. B. (2020). Control of spin dynamics in artificial honeycomb spin-ice-based nanodisks. Physical Review B, 101(17), [174424]. https://doi.org/10.1103/PhysRevB.101.174424