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Tuning Metamaterials by using Amorphous Magnetic Microwires.

V Lopez-Dominguez1,2, M A Garcia3,4, P Marin3,5

  • 1Instituto de Magnetismo Aplicado UCM-adif, A6 km.22'5 - Apdo. Correos 155, Las Rozas, Madrid, 28230, Spain. v.lopez@csic.es.

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Summary

We show that amorphous magnetic microwires can tune metamaterial electromagnetic properties using low magnetic fields. This allows for magnetic field control of metamaterial resonance at microwave frequencies.

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Area of Science:

  • Condensed Matter Physics
  • Electromagnetism
  • Materials Science

Background:

  • Metamaterials offer unique electromagnetic properties.
  • Controlling metamaterial properties with external fields is desirable.
  • Amorphous magnetic microwires possess high magnetic permeability at microwave frequencies.

Purpose of the Study:

  • To demonstrate the tuning of metamaterial electromagnetic properties using magnetic fields.
  • To investigate the integration of amorphous magnetic microwires into metamaterials.
  • To explore the physical basis of magnetic field-metamaterial interaction.

Main Methods:

  • Theoretical modeling of metamaterial-microwire interaction.
  • Experimental fabrication of metamaterials with Co-based microwires.
  • Microwave frequency measurements of metamaterial resonance.

Main Results:

  • Demonstrated tunability of metamaterial resonance with magnetic fields (tens of Oe).
  • Observed large permeability of amorphous magnetic microwires at microwave frequencies.
  • Detailed calculations and experimental validation for Split Ring Resonator arrays.

Conclusions:

  • Amorphous magnetic microwires enable effective magnetic tuning of metamaterial properties.
  • Low magnetic fields can control microwave resonance in metamaterials.
  • This approach offers a pathway for novel tunable electromagnetic devices.