GMI EFFECT IN Co70,5Fe4,5Si15B10 AMORPHOUS GLASS-COATED MICROWIRES

Abstract

Ferromagnetic amorphous glass-coated microwires are progressive materials that exhibit very useful behavior, like the giant magnetoimpedance (GMI) effect, which is the base the operating principles for different magnetic sensors. The field sensitivity of a typical GMI sensor can reach a value as high as 500%. In order to obtain large GMI values, it is necessary to choose the optimal chemical composition of the wire material with large permeability and small penetration depth. This work is aimed to study the magnetic properties of Co70,5Fe4,5Si15B10 alloys for GMI sensor application. Low prices and high flexibility of GMI sensors will warrant wide-ranging application in the near future.