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Systematic optimization of the sensing properties of ring-core fluxgate sensors with different core diameters and materials

•Optimization of sensing properties of ring-core fluxgate sensor was realized.•The optimal core diameter and the core materials were assigned in the examined series of cobalt based amorphous sof magnetic materials.•Finding appropriate annealing route for the sensor cores, the noise level of ∼1pT/√Hz...

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Published in:Sensors and actuators. A. Physical. 2017-03, Vol.255, p.94-103
Main Authors: Can, Hava, Svec, Peter, Bydzovsky, Jan, Sözeri, Hüseyin, Topal, Uğur
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Language:English
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cited_by cdi_FETCH-LOGICAL-c325t-b925c239ed45da5da1b27f12b61f5ab94887aadbab5e223dd896648bdd055c823
cites cdi_FETCH-LOGICAL-c325t-b925c239ed45da5da1b27f12b61f5ab94887aadbab5e223dd896648bdd055c823
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container_title Sensors and actuators. A. Physical.
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creator Can, Hava
Svec, Peter
Bydzovsky, Jan
Svec, Peter
Sözeri, Hüseyin
Topal, Uğur
description •Optimization of sensing properties of ring-core fluxgate sensor was realized.•The optimal core diameter and the core materials were assigned in the examined series of cobalt based amorphous sof magnetic materials.•Finding appropriate annealing route for the sensor cores, the noise level of ∼1pT/√Hz @1Hzandthesensitivityoflargerthan1MV(*)/T was reached. In this study, a series of cobalt-riched alloy compositions Co71-xFexCr7Si8B14 (x=0, 2.0, 3.2, 4.0, 6.0 and 8.0) in the form of ribbons were produced to change magnetization characteristics and constants of magnetostriction in a controllable manner. In this way dominant parameters for the design of low-noise fluxgate sensor were determined. The studies were carried out in ring-core geometry for different diameters from 6mm to 20mm. Our experiments have shown that low values of the saturation magnetic induction Bs inherent for this alloy system had a crucial role for the noise level. With the cores having Bs of ∼0.4T, we could achieve a noise level of ∼1pT/√Hz @ 1Hz. The specific features of design of the ring-core fluxgates having different dynamical ranges were also discussed thoroughly. The ring-core diameter of 15mm was found to be optimal geometry for outdoor applications.
doi_str_mv 10.1016/j.sna.2017.01.013
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subjects Alloy systems
Amorphous metallic core
Annealing
Cobalt
Cobalt base alloys
Design parameters
Fluxgate magnetometers
Fluxgate noise
Fluxgates
Magnetic induction
Magnetism
Magnetometer
Magnetostriction
Optimization
Sensors
title Systematic optimization of the sensing properties of ring-core fluxgate sensors with different core diameters and materials
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