MAGNETOMETER BASED ON THE IMPEDANCE PHASE OF GMI SENSORS USING THE DMTD METHOD

D. M. Szwarcman, E. Costa Silva, C. R. Hall Barbosa, E. Costa Monteiro

Abstract

Giant Magnetoimpedance (GMI) sensors are a new family of magnetic sensing devices that show potential to detect ultra-weak magnetic fields. Recent studies demonstrated that phase-based GMI magnetometers can achieve very high sensitivities. This work aims at the development of an enhanced GMI magnetometer, based on a high resolution digital phase reading electronic circuit that makes use of the Dual Mixer Time Difference method, to read the impedance phase variations of GMI samples.

Keywords

impedance phase, giant magnetoimpedance, magnetic sensors, high resolution, DMTD

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IMEKO-WC-2015-TC4-121.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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