Skin-effect and circumferential permeability in micro-wires utilized in GMI-sensors

摘要: Abstract The penetration depth of the skin-effect and circumferential permeability have been calculated for a magnetic micro-wire nominal composition Co67Fe3.85Ni1.45Mo1.7Si14.5B11.5 displaying large giant magnetoimpedance (GMI) effect. For these calculations simple model was applied in which rough assumption made that changes real component impedance are due only to effective cross-section wire AC-current. evolution both, permeability, is presented as function DC-axial field at various frequencies AC-current, flowing along wire. These quantities using experimental data impedance. A comparison obtained imaginary with those by model, shows latter gives qualitative agreement measured dependencies.