High Sensitivity Planar Hall Effect Magnetic Field Gradiometer for Measurements in Millimeter Scale Environments

We report a specially designed magnetic field gradiometer based on a single elliptical planar Hall effect (PHE) sensor, which allows measuring magnetic field at nine different positions in a 4 mm length scale. The gradiometer detects magnetic field gradients with equivalent gradient magnetic noises...

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Detalles Bibliográficos
Autores principales: Nhalil, Hariharan, Schultz, Moty, Amrusi, Shai, Grosz, Asaf, Klein, Lior
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9694209/
https://www.ncbi.nlm.nih.gov/pubmed/36363918
http://dx.doi.org/10.3390/mi13111898
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author Nhalil, Hariharan
Schultz, Moty
Amrusi, Shai
Grosz, Asaf
Klein, Lior
author_facet Nhalil, Hariharan
Schultz, Moty
Amrusi, Shai
Grosz, Asaf
Klein, Lior
author_sort Nhalil, Hariharan
collection PubMed
description We report a specially designed magnetic field gradiometer based on a single elliptical planar Hall effect (PHE) sensor, which allows measuring magnetic field at nine different positions in a 4 mm length scale. The gradiometer detects magnetic field gradients with equivalent gradient magnetic noises of ∼958, ∼192, ∼51, and ∼26 nT/m√ Hz (pT/mm√Hz) at 0.1, 1, 10, and 50 Hz, respectively. The performance of the gradiometer is tested in ambient conditions by measuring the field gradient induced by electric currents driven in a long straight wire. This gradiometer is expected to be highly useful for the measurement of magnetic field gradients in confined areas for its small footprint, low noise, scalability, simple design, and low costs.
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spelling pubmed-96942092022-11-26 High Sensitivity Planar Hall Effect Magnetic Field Gradiometer for Measurements in Millimeter Scale Environments Nhalil, Hariharan Schultz, Moty Amrusi, Shai Grosz, Asaf Klein, Lior Micromachines (Basel) Article We report a specially designed magnetic field gradiometer based on a single elliptical planar Hall effect (PHE) sensor, which allows measuring magnetic field at nine different positions in a 4 mm length scale. The gradiometer detects magnetic field gradients with equivalent gradient magnetic noises of ∼958, ∼192, ∼51, and ∼26 nT/m√ Hz (pT/mm√Hz) at 0.1, 1, 10, and 50 Hz, respectively. The performance of the gradiometer is tested in ambient conditions by measuring the field gradient induced by electric currents driven in a long straight wire. This gradiometer is expected to be highly useful for the measurement of magnetic field gradients in confined areas for its small footprint, low noise, scalability, simple design, and low costs. MDPI 2022-11-02 /pmc/articles/PMC9694209/ /pubmed/36363918 http://dx.doi.org/10.3390/mi13111898 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Nhalil, Hariharan
Schultz, Moty
Amrusi, Shai
Grosz, Asaf
Klein, Lior
High Sensitivity Planar Hall Effect Magnetic Field Gradiometer for Measurements in Millimeter Scale Environments
title High Sensitivity Planar Hall Effect Magnetic Field Gradiometer for Measurements in Millimeter Scale Environments
title_full High Sensitivity Planar Hall Effect Magnetic Field Gradiometer for Measurements in Millimeter Scale Environments
title_fullStr High Sensitivity Planar Hall Effect Magnetic Field Gradiometer for Measurements in Millimeter Scale Environments
title_full_unstemmed High Sensitivity Planar Hall Effect Magnetic Field Gradiometer for Measurements in Millimeter Scale Environments
title_short High Sensitivity Planar Hall Effect Magnetic Field Gradiometer for Measurements in Millimeter Scale Environments
title_sort high sensitivity planar hall effect magnetic field gradiometer for measurements in millimeter scale environments
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9694209/
https://www.ncbi.nlm.nih.gov/pubmed/36363918
http://dx.doi.org/10.3390/mi13111898
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