García-Arribas Alfredo, Gutiérrez Jon, Kurlyandskaya Galina V, Barandiarán José M, Svalov Andrey, Fernández Eduardo, Lasheras Andoni, de Cos David, Bravo-Imaz Iñaki
Department of Electricity and Electronics, Basque Country University (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain.
ESS Bilbao, Paseo de Landabarri, 48940 Leioa, Spain.
Sensors (Basel). 2014 Apr 25;14(5):7602-24. doi: 10.3390/s140507602.
The outstanding properties of selected soft magnetic materials make them successful candidates for building high performance sensors. In this paper we present our recent work regarding different sensing technologies based on the coupling of the magnetic properties of soft magnetic materials with their electric or elastic properties. In first place we report the influence on the magneto-impedance response of the thickness of Permalloy films in multilayer-sandwiched structures. An impedance change of 270% was found in the best conditions upon the application of magnetic field, with a low field sensitivity of 140%/Oe. Second, the magneto-elastic resonance of amorphous ribbons is used to demonstrate the possibility of sensitively measuring the viscosity of fluids, aimed to develop an on-line and real-time sensor capable of assessing the state of degradation of lubricant oils in machinery. A novel analysis method is shown to sensitively reveal the changes of the damping parameter of the magnetoelastic oscillations at the resonance as a function of the oil viscosity. Finally, the properties and performance of magneto-electric laminated composites of amorphous magnetic ribbons and piezoelectric polymer films are investigated, demonstrating magnetic field detection capabilities below 2.7 nT.
所选软磁材料的优异特性使其成为构建高性能传感器的理想候选材料。在本文中,我们介绍了我们最近关于基于软磁材料磁性能与其电性能或弹性性能耦合的不同传感技术的工作。首先,我们报告了多层夹心结构中坡莫合金薄膜厚度对磁阻抗响应的影响。在最佳条件下,施加磁场时发现阻抗变化为270%,低场灵敏度为140%/奥斯特。其次,非晶带材的磁弹性共振被用于证明灵敏测量流体粘度的可能性,旨在开发一种能够在线实时评估机械中润滑油降解状态的传感器。一种新颖的分析方法被证明能够灵敏地揭示共振时磁弹性振荡的阻尼参数随油粘度的变化。最后,研究了非晶磁带与压电聚合物薄膜的磁电层压复合材料的性能和性能,证明了低于2.7 nT的磁场检测能力。