Magnetic Field Sensor Based on Giant Magnetoimpedance

Giant magnetoimpedance (GMI) effect has been studied in amorphous magnetic microwires where internal mechanical stresses derived from fabrication process influence strongly in its magnetic properties. Glass covered amorphous microwire of composition (Fe 6 Co 94 ) 72.5 Si 12.5 B 15 have been characte...

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Bibliographic Details
Published in2007 International Conference on Sensor Technologies and Applications (SENSORCOMM 2007) pp. 24 - 29
Main Authors Garcia-Miquel, H., Garcia-Chocano, V.M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2007
Subjects
Amorphous magnetic materials
Amorphous materials
Fabrication
Magnetic anisotropy
Magnetic field measurement
Magnetic sensors
Mechanical sensors
Micromagnetics
Perpendicular magnetic anisotropy
Stress
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Summary:Giant magnetoimpedance (GMI) effect has been studied in amorphous magnetic microwires where internal mechanical stresses derived from fabrication process influence strongly in its magnetic properties. Glass covered amorphous microwire of composition (Fe 6 Co 94 ) 72.5 Si 12.5 B 15 have been characterized in low magnetic DC field, for AC currents from 75 to 500 muA and frequencies from 1 to 14MHz. In all measurements a double peak response, characteristic of Co-rich samples with circular anisotropy, was obtained and GMI of 99% was reached. The design of a high sensitive magnetic field sensor has been made obtaining a linear response in plusmn130 A/m range with two microwires with the appropriate bias magnetic field.
ISBN:0769529887
9780769529882
DOI:10.1109/SENSORCOMM.2007.4394892