High Sensitivity and Ultra-Low Power Consumption in DC Magnetic Field Sensor Based on (1-1) Connective Magnetoelectric Composites

作者：Bingfeng Ge, Jingen Wu, Xianfeng Liang, Jiacheng Qiao, Yongjun Du, Yiwei Xu, Xin He, Yanan Zhao, Zhiguang Wang, Jinghong Guo, Zhongqiang Hu, Ming Liu · 发表于：IEEE Transactions on Industrial Electronics · 年份：2025 · DOI：10.1109/tie.2025.3579054 · 被引用次数：4 · 研究领域：Magnetic Field Sensors Techniques、Multiferroics and related materials、Magnetic and transport properties of perovskites and related materials

High sensitivity and low power consumption dc magnetic field sensors are crucial for advancing various technological fields, including portable magnetometers, condition monitoring of energy system, and geophysical exploration. However, achieving high sensitivity while maintaining low power consumption remains a challenge for dc magnetic field sensors. Here, we demonstrate an electric excitation dc magnetic field sensor based on (1-1) connective magnetoelectric (ME) composite, which consists of amorphous FeBSiC alloy (Metglas) and thickness-poled piezoelectric (PZT) transformer. The theoretical analyses based on finite element simulation methods reveal that the strong magnetic-flux-concentration effect and stress aggregation effect in (1-1) connective ME composite can enhance the elastic modulus change of magnetic material on mechanical stress transfer of piezoelectric transformer, thus improving the sensitivity for dc magnetic field detection. Experimental results verified that the sensor achieved a sensitivity of 120 mV/Oe, and a limit of detection (LOD) of 20 nT under an ultra-low power consumption of 86 μW within a dc magnetic field range of 0–3 Oe, representing a significant advancement in electric excitation (coil-free) dc magnetic field detection. This article demonstrates the potential of combining PZT transformer with magnetostriction materials for dc magnetic field detection.