Effect of the metal-to-wire ratio on the high-frequency magnetoimpedance of glass-coated CoFeBSi amorphous microwires

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dc.creatorValenzuela, R.
dc.creatorFessant, A.
dc.creatorGieraltowski, J.
dc.creatorTannous, C.
dc.date2007-01-04
dc.date2007-05-12
dc.date.accessioned2026-07-07T08:00:49Z
dc.date.available2026-07-07T08:00:49Z
dc.descriptionHigh frequency [1-500 MHz] measurements of the magnetoimpedance (MI) of glass-coated Co$_{69.4}$Fe$_{3.7}$B$_{15.9}$Si$_{11}$ microwires are carried out with various metal-to-wire diameter ratios. A twin-peak, anhysteretic behaviour is observed as a function of magnetic field. A maximum in the normalized impedance, $ΔZ$/$Z$, appears at different values of the frequency $f$, 125, 140 and 85 MHz with the corresponding diameter ratio $p$ = 0.80, 0.55 and 0.32. We describe the measurement technique and interpret our results with a thermodynamic model that leads to a clearer view of the effects of $p$ on the maximum value of MI and the anisotropy field. The behavior of the real and imaginary components of impedance is also investigated; they display a resonance that becomes a function of the DC field $H_{DC}$ for values larger or equal to $H_{K}$ the circumferential anisotropy field for each $p $ value. These results are interpreted in terms of a rotation model of the outer shell magnetization.
dc.description8 pages, 8 figures, to appear in Sensors and Actuators (Elsevier)
dc.identifierhttps://arxiv.org/abs/cond-mat/0701077
dc.identifierhttp://arxiv.org/abs/cond-mat/0701077
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/128768
dc.subjectMaterials Science
dc.titleEffect of the metal-to-wire ratio on the high-frequency magnetoimpedance of glass-coated CoFeBSi amorphous microwires
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