Lee Yong-Woo, Soh Joon-Young, Yoo Il-Ryeol, Cho Jiung, Ahn Cheol-Woo, Choi Jong-Jin, Hahn Byung-Dong, Cho Kyung-Hoon
School of Materials Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Korea.
New & Renewable Energy Lab., KEPCO Research Institute, Daejeon 34056, Korea.
Sensors (Basel). 2020 Nov 19;20(22):6635. doi: 10.3390/s20226635.
In this study, composite devices were fabricated using ferromagnetic FeSiB-based alloys (Metglas) and ferroelectric ceramics, and their magnetic field sensitivity was evaluated. Sintered 0.95Pb(ZrTi)O-0.05Pb(MnSb)O (PZT-PMS) ceramic exhibited a very dense microstructure with a large piezoelectric voltage coefficient ( = -16.8 × 10 VmN) and mechanical quality factor ( > 1600). Owing to these excellent electromechanical properties of the PZT-PMS, the laminate composite with a Metglas/PZT-PMS/Metglas sandwich structure exhibited large magnetoelectric voltage coefficients () in both off-resonance and resonance modes. When the length-to-width aspect ratio (/) of the composite was controlled, slightly varied in the off-resonance mode, resulting in similar sensitivity values ranging from 129.9 to 146.81 VT. Whereas in the resonance mode, the composite with small / exhibited a large reduction of and sensitivity values. When controlling the thickness of the PZT-PMS (), the of the composite showed the largest value when was the smallest in the off-resonance mode, while was the largest when is the largest in the resonance mode. The control of slightly affected the sensitivity in the off-resonance mode, however, higher sensitivity was obtained as increased in the resonance mode. The results demonstrate that the sensitivity, varying with the dimensional control of the composite, is related to the mechanical loss of the sensor. The composite sensor with the PZT-PMS layer exhibited excellent magnetic field sensitivity of 1.49 × 10 VT with a sub-nT sensing limit, indicating its potential for application in high-performance magnetoelectric sensor devices.
在本研究中，使用铁磁基FeSiB合金（美特格拉斯）和铁电陶瓷制造了复合器件，并对其磁场灵敏度进行了评估。烧结的0.95Pb(ZrTi)O-0.05Pb(MnSb)O（PZT-PMS）陶瓷呈现出非常致密的微观结构，具有较大的压电电压系数（=-16.8×10VmN）和机械品质因数（>1600）。由于PZT-PMS具有这些优异的机电性能，具有美特格拉斯/PZT-PMS/美特格拉斯三明治结构的层压复合材料在非共振和共振模式下均表现出较大的磁电电压系数（）。当控制复合材料的长宽比（/）时，在非共振模式下略有变化，导致灵敏度值相似，范围为129.9至146.81VT。而在共振模式下，/较小的复合材料的和灵敏度值大幅降低。当控制PZT-PMS的厚度（）时，在非共振模式下，当时复合材料的显示出最大值，而在共振模式下，当时最大。对的控制在非共振模式下对灵敏度的影响较小，然而，在共振模式下随着的增加获得了更高的灵敏度。结果表明，灵敏度随复合材料尺寸控制而变化，与传感器的机械损耗有关。具有PZT-PMS层的复合传感器表现出1.49×10VT的优异磁场灵敏度，传感极限为亚纳特斯拉，表明其在高性能磁电传感器器件中的应用潜力。
