Applied Physics Letters · 1994 · 1K citations · 6 references
Natural SciencesMaterials SciencePhysicsElectromagnetismMagnetic MaterialsMetallic MaterialsAmorphous Magnetic MaterialsElectrical CharacterizationElectrical ConductivityFerromagnetismNanowiresSkin EffectAmorphous Magnetic FilmsDomain Wall DynamicsDomain Wall PinningField Strength DependenceGiant MagnetoresistanceHigh-frequency Magnetic ResponseMagnetic PermeabilityMagnetoresistance
Recent experiments have discovered a giant magneto‑impedance effect in FeCoSiB amorphous wires, with up to 60 % change in high‑frequency voltage under a dc magnetic field, analogous to giant magnetoresistance. The study examines this phenomenon through the lens of AC complex resistance or impedance. The effect arises from the skin effect combined with a strong field dependence of circumferential magnetic permeability due to circular domain wall movements. Theoretical predictions match existing experimental data satisfactorily.
Recent experiments have discovered a giant magneto-impedance (MI) effect in FeCoSiB amorphous wires. This effect includes a sensitive change (as much as 60%) in a high frequency wire voltage by an applied dc magnetic field and is thus a high frequency analog of giant magnetoresistance. We consider this phenomenon in terms of ac complex resistance or impedance. The giant MI effect is demonstrated to arise from a combination of a skin effect and a strong field dependence of the circumferential magnetic permeability associated with circular domain wall movements. The theoretical results agree satisfactorily with the existing experimental data.
6
Magneto-inductive effect (MI effect) in amorphous wires
K. Mohri, T. Kohsawa, Koichiro Kawashima et al. · IEEE Transactions on Magnetics · 1992 · 421 citations
K. Mohri, Koichiro Kawashima, T. Kohzawa et al. · IEEE Transactions on Magnetics · 1993 · 125 citations