Institute of Novel Materials and Nanotechnology, National University of Science and Technology (MISiS), 119991 Moscow, Russia.
Institute of Physics, Mathematics & IT, Immanuel Kant Baltic Federal University, 236041 Kaliningrad, Russia.
Sensors (Basel). 2019 Nov 21;19(23):5089. doi: 10.3390/s19235089.
Amorphous ferromagnetic materials in the form of microwires are of interest for the development of various sensors. This paper analyzes and argues for the use of microwires of two basic compositions of CoFeBSiCr and FeCoBSiCrMo as stress/strain and temperature sensors, respectively. The following properties make them suitable for innovative applications: miniature dimensions, small coercivity, low anisotropy and magnetostriction, tunable magnetic structure, magnetic anisotropy, and Curie temperature by annealing. For example, these sensors can be used for testing the internal stress/strain condition of polymer composite materials and controlling the temperature of hypothermia treatments. The sensing operation is based on the two fundamental effects: the generation of higher frequency harmonics of the voltage pulse induced during remagnetization in wires demonstrating magnetic bistability, and magnetoimpedance.
非晶态铁磁材料以微丝的形式引起了人们的兴趣,可用于开发各种传感器。本文分析并论证了分别使用 CoFeBSiCr 和 FeCoBSiCrMo 两种基本成分的微丝作为应力/应变和温度传感器的用途。以下特性使它们适合创新应用:微型尺寸、低矫顽力、低各向异性和磁致伸缩、可通过退火调整的磁结构、磁各向异性和居里温度。例如,这些传感器可用于测试聚合物复合材料的内部应力/应变状态和控制低温治疗的温度。传感操作基于两个基本效应:在具有磁双稳性的微丝中在重新磁化过程中感应电压脉冲的更高频谐波的产生,以及磁阻抗。