Effect of Magnetostriction on the Core Loss, Noise, and Vibration of Fluxgate Sensor Composed of Amorphous Materials

Hsu, Chang-Hung; Lee, Chun‐Yao; Chang, Yeong‐Hwa; Lin, Faa-Jeng; Fu, Chao–Ming; Lin, J. W.

doi:10.1109/tmag.2013.2248702

Cited by 27 publications

(8 citation statements)

References 11 publications

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“…Another factor is magnetostriction: traditionally it is believed that low magnetostriction is favorable to achieve low noise in fluxgate [3], [4]. Recently, Hsu et al [5] analyzed the influence of magnetostriction on power losses and acoustic noise of cores composed of amorphous tape. However, a systematic study on this topic is still missing.…”

Section: Introductionmentioning

confidence: 99%

Influence of Magnetostriction of NiFe Electroplated Film on the Noise of Fluxgate

et al. 2014

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One of the sources of fluxgate noise is the noise originating in the magnetic core. Several parameters, such as anisotropy and shape, are traditionally studied and optimized to reduce the noise. In this paper, we show how the magnetostriction influences the noise of the fluxgate. We electroplated NiFe thin-film over a copper layer using different current density. By energy-dispersive X-ray spectroscopy we show that the mutual percentage of Fe and Ni in the film depends on the current density. As a result the magnetostriction is changed from negative to positive values, with minimum magnetostriction found at around Fe 19 Ni 81 composition. When we used these ring cores as base for a fluxgate we observed that the noise rapidly rises as the absolute value of magnetostriction increases, while the minimum noise is achieved at lowest value of magnetostriction. An increase of one order of magnitude of the magnetostriction causes and increment of almost two orders of magnitude in the noise. Therefore, we conclude that it is vital to employ alloys with the lowest possible magnetostriction as core for fluxgates.

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Section: Introductionmentioning

confidence: 99%

Influence of Magnetostriction of NiFe Electroplated Film on the Noise of Fluxgate

et al. 2014

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“…29 Also in magnetic flux sensors, based on magnetostrictive effect, by increasing the frequency, the inductive voltage increases. 43 The performance of magnetostrictive ultrasonic transducers improves with decreasing frequency. So that the fluctuation of MAGF increases and the required voltage decreases.…”

Section: Frequencymentioning

confidence: 99%

The influence of coil parameters and core lamination factor on the performance of an ultrasonic transducer with a tapered core

Gandomzadeh

Abbaspour‐Fard

Rohani

et al. 2022

Int J Numerical Modelling

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Due to high piezomagnetic coefficient of the synthetic giant magnetostrictive materials, they are able to provide good enough force and displacements for industrial applications. Some natural materials such as nickel also exhibit magnetostrictive properties, but with poor performance, which might be improved by some electromagnetic manipulations. In this study, the effect of different coil parameters such as current, frequency, the number of coil turn, and the core lamination factor in different directions ([X or Y] and Z axes), on the performance of a nickel-core magnetostrictive transducer is investigated. Since the fluctuation of magnetostrictive force in the longitudinal direction of core (along the Z-axis) is an important parameter for generating the ultrasonic waves, the results showed that this force fluctuation decreases with increasing frequency. By increasing the lamination factor in the X direction, the fluctuation of magnetostrictive force along the Z-axis remains constant. However, the ultrasonic performance of the magnetostrictive transducer may be optimized by proper selection of lamination factor along the X-axis. The relationships between the results were investigated in more detail and presented as linear equations. Based on these equations, it was concluded that current and turn number of coil has the greatest positive impact on the magnetostrictive performance of the transducer, while increasing the frequency and lamination factor have a weakening effect.

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“…Such disturbances in the magnetic domain structure, as well as local vortex-like structures, can be a source of noise in GSR sensors that use this type of wire. Thermal noise and the magnetostriction of magnetic materials have been reported to be one of the causes of noise in GMI sensors and fluxgate magnetic sensors using amorphous magnetic materials [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. However, although observations of the magnetic domains of wires with diameters of 50 to 100 µm have been made, there have been few studies of the domains of amorphous magnetic wires with diameters of less than 50 µm, such as those used in GSR sensors [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Observation of Magnetic Domains in Amorphous Magnetic Wires with a Diameter of 10 μm Used in GSR Sensors

Takezawa

Harada

Honkura³

et al. 2023

Sensors

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The core of a Gigahertz Spin Rotation (GSR) sensor, a compact and highly sensitive magnetic sensor, is composed of Co–Fe-based amorphous magnetic wire with a diameter of 10 μm. Observations of the magnetic domain structure showed that this magnetic wire has unusual magnetic noise characteristics. Bamboo-shaped magnetic domains a few hundred micrometers in width were observed to form inside the wire, and smaller domains a few micrometers across were observed to form inside these larger domains. The magnetic domain pattern changed abruptly when an external magnetic field was applied to the wire. Herein is shown how these changes may be a source of magnetic noise in the wire.

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Effect of Magnetostriction on the Core Loss, Noise, and Vibration of Fluxgate Sensor Composed of Amorphous Materials

Cited by 27 publications

References 11 publications

Influence of Magnetostriction of NiFe Electroplated Film on the Noise of Fluxgate

Influence of Magnetostriction of NiFe Electroplated Film on the Noise of Fluxgate

The influence of coil parameters and core lamination factor on the performance of an ultrasonic transducer with a tapered core

Observation of Magnetic Domains in Amorphous Magnetic Wires with a Diameter of 10 μm Used in GSR Sensors

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