Evaluation of Metglas/polyvinylidene fluoride magnetoelectric bilayer composites for flexible in-plane resonant magnetic sensors

作者：Hao Zhang, Xuejian Mu, Shuya Yang, Chen‐Yan Zhang, Jie Xu, Xia Wang, Qiang Li, Derang Cao, Shandong Li · 发表于：Journal of Physics D Applied Physics · 年份：2020 · DOI：10.1088/1361-6463/abc990 · 被引用次数：16 · 研究领域：Multiferroics and related materials、Advanced Sensor and Energy Harvesting Materials、Acoustic Wave Resonator Technologies

Abstract Flexible magnetic sensors are attracting more and more attention because of their application in wearable devices. In this paper, Metglas/polyvinylidene fluoride (PVDF) bilayer composite with good flexibility was fabricated to evaluate its applicability as a flexible in-plane magnetic sensor. The magnetoelectric (ME) coupling characteristics and sensing performance of the sample were investigated under different test conditions, including different AC and DC magnetic field, and changing the direction of the magnetic field and the bending degree of the sample. The sample shows a large ME coefficient with a value of 176.41 V cm −1 Oe. The sensitivity, linearity and deviation of the sample are 892.96 mV Oe −1 , 0.99965 and ±2% for the AC magnetic field, and 157.6 mV Oe −1 , 0.99444 and ±5% for the DC magnetic field, respectively, and it shows excellent stability over repetitions. Moreover, the sample was gradually rotated anticlockwise in the magnetic fields. The output voltage of the sample varies with the rotation angle and has a good symmetry in plane, which is described well by a sine function. In addition, the clamping effect of the sample was studied. Even when bent, the sample still maintains an excellent and stable performance. The sensitivity and linearity of the sample with a bent angle of 23.5° are 254.37 mV Oe −1 and 0.99975 for the AC magnetic field, and 28.07 mV Oe −1 and 0.99309 for the DC magnetic field, respectively. The deviation of measurements is sma...