Title :
Giant magneto-impedance in multilayers of magnetic amorphous ribbons
Author :
Amalou, Farid ; Gijs, Martin
Author_Institution :
Inst. of Microelectron. & Microsystems, Swiss Fed. Inst. of Technol., Lausanne, Switzerland
Abstract :
We have patterned multilayers of amorphous magnetic foils of Metglas® 2714a (cobalt-based) and Cu foil into microstructures of different sizes. We have studied the GM effect in these structures, and we have characterized the behavior of the relative permeability as a function of frequency and magnetic field. We obtain GMI ratios [Zmax-Z(Bsat)]/Z(Bsat) up to 800% and GMR ratios [Rmax-R(Bsat)]/R(Bsat) up to 2400% at frequencies of 100 kHz-10 MHz, with Bsat the magnetic field where impedance and resistance saturate (typically a few mT).
Keywords :
amorphous magnetic materials; copper; giant magnetoresistance; magnetic multilayers; metallic glasses; Cu foil; Metglas® 2714a; giant magneto-impedance; magnetic amorphous ribbons; microstructures; patterned multilayers; relative permeability; Amorphous magnetic materials; Amorphous materials; Copper; Frequency; Magnetic field measurement; Magnetic flux; Magnetic materials; Magnetic multilayers; Perpendicular magnetic recording; Saturation magnetization;
Conference_Titel :
Sensors, 2002. Proceedings of IEEE
Print_ISBN :
0-7803-7454-1
DOI :
10.1109/ICSENS.2002.1037200
