Multimode delta-E effect magnetic field sensors with adapted electrodes
Multimode delta-E effect magnetic field sensors with adapted electrodes
复制标题
DOI：
10.1063/1.4952735
复制
发表时间：
2016-05-30
影响因子：
4
通讯作者：
Faupel, Franz
中科院分区：
文献类型：
--
作者：
Zabel, Sebastian;Reermann, Jens;Faupel, Franz
介绍了一种利用磁致伸缩层的Delta-E效应测量低频磁场的低噪声压电薄膜谐振器的理论和实验研究。来自机电谐振器物理模型的计算使电极设计能够有效地在第一和第二横向弯曲模式下工作。根据我们的计算，改进的电极设计将灵敏度提高了6倍，传感器输出的动态范围减小了16d B，大大降低了对读出电子学的要求。磁性测量表明，在噪声水平约为100 pTHz(-0.5)的情况下，带宽为100 Hz。由AIP出版公司出版。
We present an analytical and experimental study on low-noise piezoelectric thin film resonators that utilize the delta-E effect of a magnetostrictive layer to measure magnetic fields at low frequencies. Calculations from a physical model of the electromechanical resonator enable electrode designs to efficiently operate in the first and second transversal bending modes. As predicted by our calculations, the adapted electrode design improves the sensitivity by a factor of 6 and reduces the dynamic range of the sensor output by 16 dB, which significantly eases the requirements on readout electronics. Magnetic measurements show a bandwidth of 100 Hz at a noise level of about 100 pTHz(-0.5). Published by AIP Publishing.