The Next Generation of Magnetometer Microsystems and Applications, 2nd Edition

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "A:Physics".

Deadline for manuscript submissions: 31 October 2025 | Viewed by 2013

Special Issue Editors


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Guest Editor
School of Semiconductors and Physics, North University of China, Taiyuan 030051, China
Interests: quqantum sensing; precision measurement; MEMS; AFM
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
School of Instrument and Electronics, North University of China, Taiyuan 030051, China
Interests: magnetometer; quantum sensor; chip scale
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
School of Instrument Science and Technology, North University of China, Taiyuan 030051, China
Interests: chip scale; quantum sensor; application
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Magnetic field sensors, including superconducting quantum interference devices (SQUIDs), giant magnetoresistance (GMR), SERF (spin exchange relaxation-free), Hall sensors, as well as NV magnetometers, are indispensable in a wide range of industrial and scientific fields. Nowadays, femtotesla fetotesla to picotesla sensitivity under various conditions has been achieved using the magnetometers mentioned above with a small volume, especially in cardiac magnetography and magnetoencephalography, geomagnetic measurements, metal contaminant detection, etc. Therefore, the focus of this Special Issue is on promising portable magnetometers and their application by decreasing the sensing volume and enhancing magnetic field sensitivity with integrated technologies, MEMS, chip-scale processing, and even microsystem technologies. This Special Issue calls for original research papers and reviews detailing state-of-the-art results on these topics.

Prof. Dr. Zongmin Ma
Prof. Dr. Huanfei Wen
Prof. Dr. Xiujian Chou
Guest Editors

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Keywords

  • quantum sensor
  • magnetometer
  • chip scale
  • NV center
  • OPM
  • SQUID
  • SERF
  • magnetometer microsystem
  • magnetometer application

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Related Special Issue

Published Papers (2 papers)

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Research

10 pages, 3122 KiB  
Article
Low-Frequency Magnetic Sensing Using Magnetically Modulated Microcavity Resonant Mode
by Xinrong Yang, Jiamin Rong, Enbo Xing, Jianglong Li, Yujie Zhang, Yanru Zhou, Wenyao Liu, Huanfei Wen, Jun Tang and Jun Liu
Micromachines 2025, 16(4), 405; https://doi.org/10.3390/mi16040405 - 29 Mar 2025
Viewed by 232
Abstract
We propose a low-frequency magnetic sensing method using a magnetically modulated microcavity resonant mode. Our magnetically sensitive unit with periodically changing magnetic poles is formed by combining an AC excitation coil with a microcavity. The microcavity vibrates at the frequency of the AC [...] Read more.
We propose a low-frequency magnetic sensing method using a magnetically modulated microcavity resonant mode. Our magnetically sensitive unit with periodically changing magnetic poles is formed by combining an AC excitation coil with a microcavity. The microcavity vibrates at the frequency of the AC amplitude-modulated signal and changes its resonant mode when the sensing unit interacts with a low-frequency magnetic field. Signal processing is performed on the resonant spectrum to obtain low-frequency magnetic signals. The results of the experiment show that the measured sensitivity to a 0.5 Hz magnetic field is 12.49 V/mT, and a bias instability noise of 16.71 nT is achieved. We have extended the measurable frequency range of the whispering gallery mode microcavity magnetometer and presented a development in microcavity magnetic sensing and optical readout. Full article
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10 pages, 2792 KiB  
Article
Simultaneously Detecting the Power and Temperature of a Microwave Sensor via the Quantum Technique
by Zhenrong Zhang, Yuchong Jin, Jun Tang and Jun Liu
Micromachines 2024, 15(11), 1305; https://doi.org/10.3390/mi15111305 - 28 Oct 2024
Viewed by 1377
Abstract
This study introduces a novel method for the simultaneous detection of microwave sensor power and temperature, leveraging nitrogen-vacancy (NV) centers as a robust quantum system. Through precise measurement of the optical detection magnetic resonance contrast in NV centers, the microwave power is accurately [...] Read more.
This study introduces a novel method for the simultaneous detection of microwave sensor power and temperature, leveraging nitrogen-vacancy (NV) centers as a robust quantum system. Through precise measurement of the optical detection magnetic resonance contrast in NV centers, the microwave power is accurately determined. Furthermore, the temperature of the sensor is obtained by monitoring the variations in zero-field splitting and thorough spectral analysis. This method enables the efficient real-time acquisition of synchronized data on both microwave power and temperature from the sensor, facilitating concurrent monitoring without the necessity of additional sensing devices. Finally, we verified that the magnetic sensitivity of the system is approximately 1.2 nT/Hz1/2, and the temperature sensitivity is around 0.38 mK/Hz1/2. The minimum resolution of microwave power is about 20 nW. The experimental results demonstrate that this quantum measurement technique provides stable and accurate data across a wide range of microwave power and temperature conditions. These findings indicate substantial potential for this technique in advanced applications such as aerospace, medical diagnostics, and high-frequency communications. Future studies will aim to extend the industrial applicability of this method by refining quantum control techniques within NV center systems. Full article
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