Modeling of High-Sensitivity SAW Magnetic Field Sensors with Au-SiO2 Phononic Crystals

• DOI: 10.48550/arxiv.2502.06346
• Publication Date: 2025-02-10
• Authors: Mohsen Samadi; Jana Marie Meyer; Elizaveta Spetzler; Benjamin Spetzler; Jeffrey McCord; Fabian Lofink; Martina Gerken
• Keywords: Acoustic Metamaterials

The development of magnetic field sensors with high sensitivity is crucial for accurate detection fields. In this context, we present a theoretical model highly sensitive surface acoustic wave (SAW) sensor that utilizes phononic crystal (PnC) structures composed Au pillars embedded within SiO2 guiding layer. We study rectangular and triangular PnCs assess their potential application in thin-film sensors. our design, the PnC integrated into layer, preserving continuous magnetostrictive layer maximizing its interaction SAW. achieves nearly two orders magnitude higher compared to delay line similar dimensions an eight-fold improvement over previous design FeCoSiB pillars. enhanced attributed resonance effects leading increased between SAW covering PnC. Our results highlight significant incorporating SAWs future performance