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A Weak-Magnetic-Field Measurement System with Large-Scale Uniformity and a Low Limit of Detection.

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Title: A Weak-Magnetic-Field Measurement System with Large-Scale Uniformity and a Low Limit of Detection.
Authors: Meng, Qingzhi1 (AUTHOR), Wang, Yongshuai1,2 (AUTHOR), Liang, Xianfeng2,3 (AUTHOR), Wang, Yixue2,4 (AUTHOR), Lu, Yang2,5 (AUTHOR), Ju, Dengfeng2,6 (AUTHOR), Zhang, Yuan3,4,7 (AUTHOR), Lin, Qijing1,5,6,7 (AUTHOR) qjlin2015@xjtu.edu.cn
Source: Nanomaterials (2079-4991). Jun2026, Vol. 16 Issue 12, p719. 17p.
Subjects: Magnetic field measurements, Uniformity, Magnetic shielding, Magnetic sensors, Magnetic measurements
Abstract: This paper introduces a weak-magnetic-field measurement system characterized by a large-scale uniform magnetic field and a low magnetic limit of detection (LOD). The system employs a four-ring coil assembly housed within a multi-layer magnetic shielding cavity, generating a uniform magnetic field region of 120 mm while achieving a minimum LOD of less than 10 pT. The performance of the weak-magnetic-field measurement system is appropriately validated using a bulk magnetic–electric (ME) sensor. The experimental results confirm the system's dual functionalities in both magnetic sensor calibration and the measurement of weak magnetic parameters. Notably, this methodology is readily applicable to various forms of weak-magnetic-field measurement. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Header DbId: egs
DbLabel: Engineering Source
An: 194907438
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  Data: A Weak-Magnetic-Field Measurement System with Large-Scale Uniformity and a Low Limit of Detection.
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  Data: <searchLink fieldCode="AR" term="%22Meng%2C+Qingzhi%22">Meng, Qingzhi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Yongshuai%22">Wang, Yongshuai</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liang%2C+Xianfeng%22">Liang, Xianfeng</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Yixue%22">Wang, Yixue</searchLink><relatesTo>2,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lu%2C+Yang%22">Lu, Yang</searchLink><relatesTo>2,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ju%2C+Dengfeng%22">Ju, Dengfeng</searchLink><relatesTo>2,6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Yuan%22">Zhang, Yuan</searchLink><relatesTo>3,4,7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lin%2C+Qijing%22">Lin, Qijing</searchLink><relatesTo>1,5,6,7</relatesTo> (AUTHOR)<i> qjlin2015@xjtu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Jun2026, Vol. 16 Issue 12, p719. 17p.
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  Data: <searchLink fieldCode="DE" term="%22Magnetic+field+measurements%22">Magnetic field measurements</searchLink><br /><searchLink fieldCode="DE" term="%22Uniformity%22">Uniformity</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+shielding%22">Magnetic shielding</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+sensors%22">Magnetic sensors</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+measurements%22">Magnetic measurements</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This paper introduces a weak-magnetic-field measurement system characterized by a large-scale uniform magnetic field and a low magnetic limit of detection (LOD). The system employs a four-ring coil assembly housed within a multi-layer magnetic shielding cavity, generating a uniform magnetic field region of 120 mm while achieving a minimum LOD of less than 10 pT. The performance of the weak-magnetic-field measurement system is appropriately validated using a bulk magnetic–electric (ME) sensor. The experimental results confirm the system's dual functionalities in both magnetic sensor calibration and the measurement of weak magnetic parameters. Notably, this methodology is readily applicable to various forms of weak-magnetic-field measurement. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/nano16120719
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        Text: English
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        Type: general
      – SubjectFull: Uniformity
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      – SubjectFull: Magnetic shielding
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      – SubjectFull: Magnetic sensors
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              Text: Jun2026
              Type: published
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