Wireless Multifunctional Surface Acoustic Wave Sensor for Magnetic Field and Temperature Monitoring
Source abstract
Abstract
Abstract A one‐port surface acoustic wave (SAW) resonator based on Co40–Fe40–B20/SiO2/ZnO/quartz multilayer structure and exhibiting a dual mode, Rayleigh and Love wave modes, is investigated to achieve a multifunctional sensor measuring both temperatures and magnetic fields. The Rayleigh wave mode of the resonator is used for temperature measurement with a temperature sensitivity of −37.9 ppm/°C, and the Love wave mode is used for magnetic field measurement. Co40‐Fe40‐B20 is the magnetic sensitive layer, and quartz crystal is the piezoelectric substrate. ZnO film is also a piezoelectric but considered here in combination with SiO2 as insulating layers and serves to control impedance matching and temperature dependence of the sensor. ZnO and SiO2 thicknesses are selected to realize temperature compensation for the Love wave mode and making this mode highly sensitive to magnetic fields and insensitive to temperatures. The magnetic field sensitivities of −170.4 kHz m−1 T−1 and −621.6 kHz m−1 T−1 are obtained respectively for the fundamental and the third harmonic of the Love wave mode. The proposed structure is beneficial to design reliable hybrid SAW magnetic field and temperature sensors.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Acoustic Wave Resonator Technologies · Gas Sensing Nanomaterials and Sensors · Mechanical and Optical Resonators
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China
The Institut Jean Lamour UMR 7198 Université de Lorraine – CNRS Nancy 54000 France
Funding
Federación Española de Enfermedades Raras
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