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Standalone Integrated Magnonic Devices.

M Cocconcelli1, F Maspero1, A Micelli1

  • 1Dipartimento di Fisica, Politecnico di Milano, Via G. Colombo 81, Milano, 20133, Italy.

Advanced Materials (Deerfield Beach, Fla.)
|July 23, 2025
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Summary
This summary is machine-generated.

Researchers developed a compact, tunable magnonic device for beyond 6G communications. This standalone system integrates all-electric input/output, overcoming previous limitations of bulky magnetic bias fields for spin wave propagation.

Keywords:
magnonic devicespermanent micromagnetsphase shifter

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Area of Science:

  • Physics
  • Materials Science
  • Electrical Engineering

Background:

  • Magnonics offers potential for beyond 6G telecommunication platforms.
  • External magnetic bias fields for spin wave propagation are a major bottleneck for integrating magnonic devices into RF systems.

Purpose of the Study:

  • To demonstrate the first standalone, tunable magnonic device with all-electric input/output.
  • To integrate a magnonic device onto a silicon substrate with a compact footprint.

Main Methods:

  • Fabrication of a CoFeB waveguide with RF antennas, flux concentrators, and SmCo permanent micromagnets.
  • Tuning the transverse bias field by adjusting the distance between flux concentrators and permanent magnets (0-12 µm).
  • Modulation of Damon-Eshbach spin wave modes and their dispersion relation.

Main Results:

  • Achieved a compact device (100 × 150 µm²) with tunable bias field (11-20.5 mT).
  • Demonstrated spin wave frequency band from 3 to 8 GHz.
  • Precise tuning of phase shift up to 120 degrees at 6 GHz.

Conclusions:

  • The developed device overcomes the need for bulky external magnetic fields.
  • The compact, tunable magnonic device is suitable for integration into RF systems for beyond 6G applications.
  • Operational frequency can be extended via micromagnet engineering.