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Related Experiment Video

Updated: Jan 20, 2026

Growing Protein Crystals with Distinct Dimensions Using Automated Crystallization Coupled with In Situ Dynamic Light Scattering
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Magnon-Magnon Interaction Induced by Dynamic Coupling in a Hybrid Magnonic Crystal.

Rawnak Sultana1, Mojtaba Taghipour Kaffash1, Gianluca Gubbiotti2

  • 1Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, United States.

ACS Applied Electronic Materials
|January 19, 2026
PubMed
Summary

This study reveals how artificial spin ice geometry controls spin waves in hybrid magnonic crystals. The findings show enhanced spin wave transmission and manipulation through tailored interlayer coupling.

Keywords:
Brillouin light scattering spectroscopyartificial spin icemagnonic crystalmagnon−magnon couplingmicromagnetismnanomagnetismnanomagnonicspatterned nanostructuresspin waves

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Hybrid magnonic crystals offer tunable spin-wave properties.
  • Artificial spin ice (ASI) structures provide geometric control over magnetism.

Purpose of the Study:

  • Investigate spin-wave dynamics in a CoFeB ASI/NiFe film hybrid system.
  • Understand the role of interlayer coupling and ASI geometry on spin waves.

Main Methods:

  • Combined experimental Brillouin light scattering (BLS) spectroscopy and micromagnetic simulations.
  • Probed frequency dependence of spin waves versus magnetic field and wavevector.

Main Results:

  • Observed pronounced hybridization between ASI edge modes and NiFe backward volume modes due to interlayer dipolar coupling.
  • A triplet of peaks in BLS spectra, predicted by simulations and confirmed experimentally, indicates strong magnon-magnon coupling.
  • Magnon-magnon coupling was observed across a wide magnetic field range, influencing spin-wave dispersion and hysteresis loop response.

Conclusions:

  • ASI geometry can selectively enhance specific spin-wave wavelengths in underlying films.
  • This enhancement creates preferential channels for spin wave transmission and manipulation.
  • The findings pave the way for designing advanced magnonic devices.