Operational Parameters for Sub-Nano Tesla Field Resolution of PHMR Sensors in Harsh Environments Article Swipe

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Taehyeong Jeon , Proloy T. Das , Mijin Kim , Changyeop Jeon , Byeonghwa Lim , Ivan Soldatov , CheolGi Kim ·

YOU? · · 2021 · Open Access · · DOI: https://doi.org/10.3390/s21206891

The resolution of planar-Hall magnetoresistive (PHMR) sensors was investigated in the frequency range from 0.5 Hz to 200 Hz in terms of its sensitivity, average noise level, and detectivity. Analysis of the sensor sensitivity and voltage noise response was performed by varying operational parameters such as sensor geometrical architectures, sensor configurations, sensing currents, and temperature. All the measurements of PHMR sensors were carried out under both constant current (CC) and constant voltage (CV) modes. In the present study, Barkhausen noise was revealed in 1/f noise component and found less significant in the PHMR sensor configuration. Under measured noise spectral density at optimized conditions, the best magnetic field detectivity was achieved better than 550 pT/√Hz at 100 Hz and close to 1.1 nT/√Hz at 10 Hz for a tri-layer multi-ring PHMR sensor in an unshielded environment. Furthermore, the promising feasibility and possible routes for further improvement of the sensor resolution are discussed.

Related Topics

Voltage

Materials Science

Planar Transmission Line

Optoelectronics

Magnetic Field

Acoustics

Electrical Engineering

Physics

Electronic Engineering

Artificial Intelligence

Concepts

Barkhausen effect Noise (video) Sensitivity (control systems) Johnson–Nyquist noise Voltage Resolution (logic) Materials science Magnetoresistance Infrasound Planar Optoelectronics Flicker noise Magnetic field Acoustics Electrical engineering Physics Electronic engineering Noise figure Engineering Computer science Computer graphics (images) Quantum mechanics CMOS Magnetization Image (mathematics) Amplifier Artificial intelligence

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Type: article
Language: en
Landing Page: https://doi.org/10.3390/s21206891
PDF: https://www.mdpi.com/1424-8220/21/20/6891/pdf?version=1634806807
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Cited By: 7
References: 68
Related Works: 10
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DOI: https://doi.org/10.3390/s21206891

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Title: Operational Parameters for Sub-Nano Tesla Field Resolution of PHMR Sensors in Harsh Environments

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Language: en

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Publication year: 2021

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Publication date: 2021-10-18

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Authors: Taehyeong Jeon, Proloy T. Das, Mijin Kim, Changyeop Jeon, Byeonghwa Lim, Ivan Soldatov, CheolGi Kim

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Landing page: https://doi.org/10.3390/s21206891

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Concepts: Barkhausen effect, Noise (video), Sensitivity (control systems), Johnson–Nyquist noise, Voltage, Resolution (logic), Materials science, Magnetoresistance, Infrasound, Planar, Optoelectronics, Flicker noise, Magnetic field, Acoustics, Electrical engineering, Physics, Electronic engineering, Noise figure, Engineering, Computer science, Computer graphics (images), Quantum mechanics, CMOS, Magnetization, Image (mathematics), Amplifier, Artificial intelligence

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Cited by: 7

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