A Low-Noise Fundamental-Mode Orthogonal Fluxgate Magnetometer

Bazinet, Robert; Jacas, Alfredo; Confalonieri, G. A. Badini; Vázquez, M.

doi:10.1109/tmag.2013.2292834

Cited by 29 publications

(13 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, both applications require the detection of DC or very low frequency magnetic fields, which is especially challenging if 1/ f ( f : frequency) noise is present. Ultra-low LODs for magnetic field sensing in combination with ambient temperature operation and sufficient spatial resolution have been reported for orthogonal fluxgate magnetometers 6 , sensors employing the giant magnetoimpedance effect 7 , atomic magnetometers 8 , magnetoresistive devices 9 , and, most recently, for sensors using the ΔE-effect 10 . Table 1 summarizes the main important properties of these sensors.…”

Section: Introductionmentioning

confidence: 99%

“…Biomagnetic applications require a detection limit below at least 10 pT/ . Microwire fluxgate Giant magnetoimpedance Atomic magnetometer Anisotropic magnetoresitive Resonant ΔE-effect LOD at 1 Hz 1.5 pT/ 6 3 pT/ 7 10 fT/ 8 1 nT/ 9 300 pT/ 10 Frequency Bandwidth 400 Hz 6 70 kHz 11 100 Hz 8 1 MHz 9 5 Hz 10 Range 1000 nT 6 ±100 μT 11 15 nT 8 ±0.5 mT 9 >1 μT 10 …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Wide Band Low Noise Love Wave Magnetic Field Sensor System

Kittmann

Durdaut

Zabel

et al. 2018

Sci Rep

105

View full text Add to dashboard Cite

We present a comprehensive study of a magnetic sensor system that benefits from a new technique to substantially increase the magnetoelastic coupling of surface acoustic waves (SAW). The device uses shear horizontal acoustic surface waves that are guided by a fused silica layer with an amorphous magnetostrictive FeCoSiB thin film on top. The velocity of these so-called Love waves follows the magnetoelastically-induced changes of the shear modulus according to the magnetic field present. The SAW sensor is operated in a delay line configuration at approximately 150 MHz and translates the magnetic field to a time delay and a related phase shift. The fundamentals of this sensor concept are motivated by magnetic and mechanical simulations. They are experimentally verified using customized low-noise readout electronics. With an extremely low magnetic noise level of ≈100 pT/, a bandwidth of 50 kHz and a dynamic range of 120 dB, this magnetic field sensor system shows outstanding characteristics. A range of additional measures to further increase the sensitivity are investigated with simulations.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wide Band Low Noise Love Wave Magnetic Field Sensor System

Kittmann

Durdaut

Zabel

et al. 2018

Sci Rep

105

View full text Add to dashboard Cite

show abstract

“…Janosek et al developed the lowest noise fundamental-mode, orthogonal fluxgate magnetometer published so far [ 25 ]. Low noise magnetometers are important in many fields such as geomagnetic observatories, scientific experiments in aerospace, nondestructive testing and evaluation, and nanoparticle detection [ 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ]. According to the structure, fluxgate magnetometers can be classified into the parallel type and orthogonal type.…”

Section: Basic Researchmentioning

confidence: 99%

Recent Progress of Fluxgate Magnetic Sensors: Basic Research and Application

Wei

Liao

Zhang

et al. 2021

Sensors

View full text Add to dashboard Cite

Fluxgate magnetic sensors are especially important in detecting weak magnetic fields. The mechanism of a fluxgate magnetic sensor is based on Faraday’s law of electromagnetic induction. The structure of a fluxgate magnetic sensor mainly consists of excitation windings, core and sensing windings, similar to the structure of a transformer. To date, they have been applied to many fields such as geophysics and astro-observations, wearable electronic devices and non-destructive testing. In this review, we report the recent progress in both the basic research and applications of fluxgate magnetic sensors, especially in the past two years. Regarding the basic research, we focus on the progress in lowering the noise, better calibration methods and increasing the sensitivity. Concerning applications, we introduce recent work about fluxgate magnetometers on spacecraft, unmanned aerial vehicles, wearable electronic devices and defect detection in coiled tubing. Based on the above work, we hope that we can have a clearer prospect about the future research direction of fluxgate magnetic sensor.

show abstract

“…Hz at 1 Hz is the use of a pick-up coil strongly coupled to the GMI element. This is referred to as off-diagonal GMI [5], [6] or orthogonal flux-gate in fundamental mode [7], [8], [9], [10].…”

mentioning

confidence: 99%

Study of the Low-Frequency Excess Equivalent Magnetic Noise in GMI-Based Devices

Portalier¹,

Dufaÿ²,

Dolabdjian³

et al. 2017

IEEE Sensors J.

View full text Add to dashboard Cite

Low frequency equivalent magnetic noise levels of four different GMI samples, exhibiting 1/f spectral behavior, have been experimentally determined, for several excitation conditions (involving both dc current and ac excitation amplitude). Under appropriate conditions, for which the noise level at 1 Hz is minimal, coherence measurements show that the main noise source responsible for this low frequency noise is the intrinsic noise of the GMI sample. The lowest corresponding magnetic noise performances of the four samples were determined. The lowest noise level observed was 17 pT/ √ Hz at 1 Hz. It has been proposed that the imaginary part of the magnetic susceptibility, χ", a measure of the low frequency magnetization fluctuations, determines the resulting magnetic noise level of the sensor. Its values at 1 Hz has been evaluated for all four samples. Using these evaluations, expected noise levels at 1 Hz are computed, based on a previously proposed theoretical model, and compared to the measured noise performances. Under conditions for which correlation measurements shows that system noise is dominated by sensor noise, the two sets of value are in reasonably good agreement, suggesting that the proposed model for low frequency excess noise of GMI materials is essentially correct.

show abstract

A Low-Noise Fundamental-Mode Orthogonal Fluxgate Magnetometer

Cited by 29 publications

References 10 publications

Wide Band Low Noise Love Wave Magnetic Field Sensor System

Wide Band Low Noise Love Wave Magnetic Field Sensor System

Recent Progress of Fluxgate Magnetic Sensors: Basic Research and Application

Study of the Low-Frequency Excess Equivalent Magnetic Noise in GMI-Based Devices

Contact Info

Product

Resources

About