Title :
Resonance Enhancement of the Giant Magnetoimpedance Effect in Glass-Coated Microwires With Outer Conductive Layer
Author :
Wu, Z.M. ; Zhao, Z.J. ; Liu, L.P. ; Lin, H. ; Cheng, J.K. ; Yang, J.X. ; Yang, X.L.
Author_Institution :
East China Normal Univ., Shanghai
fDate :
7/1/2007 12:00:00 AM
Abstract :
We investigated resonance enhancement of the giant magnetoimpedance effect in Fe-based glass-coated microwires with an outer copper layer. We found that a capacitance forms between the ferromagnetic core and the outer conductive layer, where the glass insulator works as a dielectric layer. The composite wire formed an LC resonance circuit by itself, resulting in an increase of magnetoimpedance ratio from 250% to 330%. Here, we explain the results in terms of the LC resonance enhancement principle.
Keywords :
amorphous magnetic materials; capacitance; composite materials; ferromagnetic materials; giant magnetoresistance; glass; insulators; iron compounds; Cu - Interface; Fe73.5Cu1Nb3Si13.5B9 - System; LC resonance circuit; LC resonance enhancement; capacitance; dielectric layer; ferromagnetic core; giant magnetoimpedance effect; glass insulator; glass-coated microwires; outer copper conductive layer; Copper; Dielectrics and electrical insulation; Glass; Impedance; Magnetic cores; Magnetic field measurement; Magnetic resonance; RLC circuits; Soft magnetic materials; Wires; GMI effect; insulator; resonance enhancement;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.895740
