Optimized magneto-impedance response of in-rotating-water quenched amorphous wires

Amorphous wires with nearly zero magnetostriction, such as (Co_0.94Fe_0.06)_72.5Si_12.5B₁₅ ones with λ = -1 × 10-⁷, prepared by in-rotating-water spinning at diameters, Φ, between 80 and 125 μm, exhibit excellent soft magnetic properties, i.e. large permeability and low coercivity, which make them suitable candidates for magneto-impedance (MI) based sensing devices. The MI effect is sensitive to applied mechanical stresses, σ, and therefore it can be employed as operating principle for stress and vibration sensing, with potential applications in non-intrusive flow measurements and in landslides monitoring.