Bi-Metallic Magnetic Wire With Insulating Layer as Core for Orthogonal Fluxgate

Butta, Mattia; Ripka, Pavel; Infante, G.; Badini-Confalonieri, G. A.; Vázquez, M.

doi:10.1109/tmag.2009.2024885

Cited by 14 publications

(7 citation statements)

References 7 publications

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“…A more complex structure has been proposed by (Butta et al, 2009a) to overcome the problem of the current draining to the magnetic shell due to the skin effect. This is carried out by putting a glass layer between the copper core and the magnetic shell.…”

Section: Glass Insulationmentioning

confidence: 99%

Orthogonal Fluxgates

Butta¹

2012

Magnetic Sensors - Principles and Applications

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Section: Glass Insulationmentioning

confidence: 99%

Orthogonal Fluxgates

Butta¹

2012

Magnetic Sensors - Principles and Applications

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“…Magnetic microwires with an insulation layer between the copper core and the magnetic layer have been proposed: if there is no conductive path between the copper core and the magnetic layer, we can keep the current flowing only into the copper region, without concentration of the current to the magnetic layer at increasing frequency. This has been proven to help reduce the current amplitude to achieve full saturation of the microwire [2].…”

Section: Bi-metallic Wirementioning

confidence: 99%

Magnetic Microwires With Field-Induced Helical Anisotropy for Coil-Less Fluxgate

Butta

Ripka

Infante³

et al. 2010

IEEE Trans. Magn.

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We present a new method for production of magnetic microwire with helical anisotropy. Coil-less fluxgate sensors are generally composed of a bimetallic wire excited by an alternating current; in order for the wire to work in coil-less fluxgate mode, the magnetic layer of the wire needs to have helical anisotropy. So far, we have achieved such anisotropy by mechanically twisting the wire. However, this method has some disadvantages for practical applications, mainly regarding the sensor stability. We propose a method that provides helical anisotropy by applying a helical field during the electrodeposition: this is achieved by the superposition of a longitudinal field generated by a Helmholtz coil and a circumferential field produced by a direct current flowing through the core of the wire during electrodeposition.

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“…For this research, we used magnetic microwires produced in cooperation with the team led by M. Vazquez at the Institute for Materials Science of Madrid, CSIC, Madrid, Spain [2].…”

Section: Sensing Element and Signal Extractionmentioning

confidence: 99%

Double Coil-Less Fluxgate in Bridge Configuration

et al. 2010

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In this paper, a new method for excitation of coil-less fluxgate is presented. The purpose of this method is to reduce the spurious component of the output voltage, allowing us to increase the amplification. The method is based on the employment of two coil-less fluxgates in a double bridge, which injects pulsing current in opposite direction in each wire. By taking the difference of the voltages on the two wires, we suppress the component of the voltages, which does not change under application of external measured field. The sensitive axes are in opposite direction, so the wire feels opposite field. As a result, we will obtain an output voltage with low peak value, including only the component of the voltage that changes when we apply external field. Finally, we propose an improved version of the double bridge to allow the employment of two sensing elements with difference characteristics. This is obtained by optimizing the suppression of the spurious voltages and, at the same time, setting independently chosen values of exciting current for each wire.

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Bi-Metallic Magnetic Wire With Insulating Layer as Core for Orthogonal Fluxgate

Cited by 14 publications

References 7 publications

Orthogonal Fluxgates

Orthogonal Fluxgates

Magnetic Microwires With Field-Induced Helical Anisotropy for Coil-Less Fluxgate

Double Coil-Less Fluxgate in Bridge Configuration

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