Stress and field contactless sensor based on the scattering of electromagnetic waves by a single ferromagnetic microwire

In this paper, we report an experimental study on the microwave modulated scattering intensity for a single Fe2.25Co72.75Si10B15 amorphous metallic microwire. The modulation is driven by applying a bias magnetic field that tunes the magnetic permeability of the ferromagnetic microwire. Furthermore,...

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Veröffentlicht in:Applied physics letters 2014-09, Vol.105 (9)
Hauptverfasser: Herrero-Gómez, C., Aragón, A. M., Hernando-Rydings, M., Marín, P., Hernando, A.
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Sprache:eng
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Zusammenfassung:In this paper, we report an experimental study on the microwave modulated scattering intensity for a single Fe2.25Co72.75Si10B15 amorphous metallic microwire. The modulation is driven by applying a bias magnetic field that tunes the magnetic permeability of the ferromagnetic microwire. Furthermore, by using a magnetostrictive microwire, we also demonstrate that the microwave scattering is sensitive to mechanical stresses. In fact, we present a wireless microwave controlled stress sensor, suitable for biological applications, as a possible use of this effect. In addition, a first order theoretical approximation accounts for the observed influence of the magnetic permeability on the scattering coefficients. That model leads to predictions in good agreement with the experimental results.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4894732