Theoretical and Experimental Investigation of Temperature-Compensated off-diagonal GMI Magnetometer and its long-term Stability

Esper, A.; Dufaÿ, Bruno; Saez, Sébastien; Dolabdjian, Christophe

doi:10.1109/jsen.2020.2988939

Cited by 8 publications

(5 citation statements)

References 25 publications

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“…They are not constrained by the voltage range of an on-chip ADC chain. In addition, discrete magnetic transducers are relatively bulky with respect to chip-scale dimensions, like in the discrete fluxgate [40] and GMI sensor [33]. The magnetization fluctuations, a fundamental noise source, are then smaller, given the larger magnetic volume [44].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

A Benchmark of Integrated Magnetometers and Magnetic Gradiometers

Brajon,

Gasparin,

2023

IEEE Access

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This survey paper compiles and benchmarks the performance of integrated magnetic sensors, in terms of their noise and full-scale magnetic field. In total, we collected performance metrics of 31 sensors realized in various technologies. For each sensor, we derived a noise model to estimate the noise under the same conditions. We obtained a comprehensive benchmark with a focus on integrated devices. We also measured the noise spectrum of 11 of those sensors to confirm our noise model. Given that for many emerging applications, such as tactile, current, torque and biomagnetic sensing, the signal of interest is the field gradient to reject magnetic stray fields, we extended the benchmark to gradiometers. We developed a low-noise measurement setup and a low-field gradient (full scale: 10 μT/mm) generation setup to characterize magnetic gradiometers in this regime. The paper discusses the key sensor trade-off between precision and range, and summarizes the technology trends graphically on a trade-off curve, providing broad insight.

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Section: Discussionmentioning

confidence: 99%

“…[30] features a quantum-well GaAs Hall sensor. [31], [32] achieve one of the lowest reported noise densities for xMR and GMI respectively, while [33] also addresses the issue of 1/f noise and offset instability in GMI.…”

Section: A Device Selectionmentioning

confidence: 99%

A Benchmark of Integrated Magnetometers and Magnetic Gradiometers

Brajon,

Gasparin,

2023

IEEE Access

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“…It helps to separate analog (low noise) and digital parts for electromagnetic compatibility optimizations. The digital part manages the double excitation frequency (1 MHz, 10 kHz) by using two direct digital synthesizers (DDS) in order to improve sensor temperature stability [11]. Some DC bias current or voltage sources and switches are used to reach an automatic weak-up and full system control.…”

Section: Magnetometer Characteristicsmentioning

confidence: 99%

“…Figure 1 gives a view of the electronic board. It has been optimized to achieve low noise and long-term stability [11]. The main magnetometer characteristics are summarized in Table 1.…”

Section: Magnetometer Characteristicsmentioning

confidence: 99%

Far-Field Spatial Response of Off-Diagonal GMI Wire Magnetometers. Application to Magnetic Field Sources Sensing

Gasnier,

Dolabdjian

2024

Magnetism

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Studying the spatial response of a single-axis magnetometer could be the key parameter to optimize the ultimate performances of magnetic heads of detection. Indeed, the problem of non-orthogonality, misalignment, and 3D spatial response could be improved based on the knowledge of the 3D sensor spatial response. In that way, we have investigated the latter for our giant magneto-impedance (GMI) magnetometer, as a far-field pattern, by using a three-axis Helmholtz coil system. Firstly, we calibrate our device and secondly, we apply a specific 3D magnetic field to obtain this pattern. The latter helps to observe the directional or angular dependence of the sensor sensitivity versus the applied magnetic field, as we exemplified. The results confirm the excellent directivity of our off-diagonal GMI magnetometer. The evaluation of the associated error compared to an ideal vector magnetometer is also given and discussed.

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“…Therefore, the temperature characteristics of the TMR sensor can be divided into temperature drift without magnetic field (TDNM) and sensitivity temperature shift (with magnetic field) [11,12]. Take the TMR2505 sensor produced by Multi-Dimensional Technology Company as an example, and the output voltage error of the sensor caused by TDNM can reach 1-2% [13].…”

Section: Introductionmentioning

confidence: 99%

Research on temperature drift of tunneling magnetoresistance sensor based on proportional relationship and MacLaurin’s series

Yang

et al. 2023

IEICE Electron. Express

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To solve the problem of the Wheatstone full-bridge unequal resistance and low calculation accuracy, a calculation model for temperature drift of Tunneling Magnetoresistance sensors without magnet field is proposed. Based on proportional relation, McLaurin's series, and temperature coefficient of resistance, the model can explain the origin of sensor offset voltage, the influence of temperature on the sensor output voltage, and the high calculation accuracy. After the completion of the resistance inequality experiment and the temperature drift test without magnetic field, the experimental results show that the model data are consistent with the experimental data from 0 to 85℃, and the error is within 1%. After completing the magnetic field measurement experiments at different temperatures, it proves that the model is very accurate and can be applied to temperature software compensation.

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Theoretical and Experimental Investigation of Temperature-Compensated off-diagonal GMI Magnetometer and its long-term Stability

Cited by 8 publications

References 25 publications

A Benchmark of Integrated Magnetometers and Magnetic Gradiometers

A Benchmark of Integrated Magnetometers and Magnetic Gradiometers

Far-Field Spatial Response of Off-Diagonal GMI Wire Magnetometers. Application to Magnetic Field Sources Sensing

Research on temperature drift of tunneling magnetoresistance sensor based on proportional relationship and MacLaurin’s series

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