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Flux concentration techniques in weak magnetic field detection sensors
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Zhenhu JIN1, 2, Chenglong ZHANG1, Jiamin CHEN1, 2, *
Science & Technology Review | 2026, 44(9) : 75 - 87
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Science & Technology Review | 2026, 44(9): 75-87
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Flux concentration techniques in weak magnetic field detection sensors
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Zhenhu JIN1, 2, Chenglong ZHANG1, Jiamin CHEN1, 2, *
Affiliations
  • 1National Key Laboratory of Sensor Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100010, China
  • 2School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Published: 2026-05-13 doi: 10.3981/j.issn.1000-7857.2025.12.00040
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Weak magnetic field detection plays a crucial role in biomedicine, resource exploration and national defense, industrial inspection, and frontier scientific research, and is one of the key technologies for acquiring magnetic signals with high sensitivity and high resolution. By enhancing the local magnetic flux density and optimizing the efficiency of magnetic signal coupling, flux concentrators can significantly improve the sensitivity and signal−to−noise ratio of sensors, and thus have become core components in high−precision weak magnetic field detection systems. This paper reviews recent advances in flux concentration technology, with an emphasis on the development of magnetic circuit theory, design strategies for magnetic materials with high permeability and low coercivity, and optimization methods for flux concentrator structures with low eddy−current loss. In addition, the current status and future trends of weak magnetic field sensor technologies based on flux concentration effects are analyzed, providing references and directions for improving the sensitivity and magnetic field resolution in weak magnetic signal detection.

weak magnetic field detection  /  flux concentrator  /  soft magnetic materials  /  MEMS  /  magnetic sensors
Zhenhu JIN, Chenglong ZHANG, Jiamin CHEN. Flux concentration techniques in weak magnetic field detection sensors[J]. Science & Technology Review, 2026 , 44 (9) : 75 -87 . DOI: 10.3981/j.issn.1000-7857.2025.12.00040
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Article Info
doi: 10.3981/j.issn.1000-7857.2025.12.00040
  • Receive Date：2025-12-08
  • Online Date：2026-05-27
  • Published：2026-05-13
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  • Received：2025-12-08
  • Revised：2026-02-06
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    1National Key Laboratory of Sensor Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100010, China
    2School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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