Modeling of High‐Sensitivity SAW Magnetic Field Sensors with Au‐SiO2 Phononic Crystals
Abstract The development of high‐sensitivity magnetic field sensors is crucial for precise magnetic field detection. In this context, a theoretical model is presented for a highly sensitive surface acoustic wave (SAW) magnetic field sensor incorporating phononic crystal (PnC) structures composed of...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2025-05-01
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| Series: | Advanced Sensor Research |
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| Online Access: | https://doi.org/10.1002/adsr.202500008 |
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| author | Mohsen Samadi Jana Marie Meyer Elizaveta Spetzler Benjamin Spetzler Jeffrey McCord Fabian Lofink Martina Gerken |
| author_facet | Mohsen Samadi Jana Marie Meyer Elizaveta Spetzler Benjamin Spetzler Jeffrey McCord Fabian Lofink Martina Gerken |
| author_sort | Mohsen Samadi |
| collection | DOAJ |
| description | Abstract The development of high‐sensitivity magnetic field sensors is crucial for precise magnetic field detection. In this context, a theoretical model is presented for a highly sensitive surface acoustic wave (SAW) magnetic field sensor incorporating phononic crystal (PnC) structures composed of Au pillars embedded within a SiO2 guiding layer. Rectangular and triangular PnC configurations are studied and their potential for improving sensor performance are assessed. In the design, the PnC is integrated into the SiO2 guiding layer to preserve the continuous magnetostrictive layer, enhancing its interaction with the SAW. Results from the simulations indicate that the proposed sensor can achieve a nearly two orders of magnitude increase in sensitivity compared to a continuous delay line of similar dimensions, and an eightfold improvement over a previous sensor design with PnCs composed of magnetostrictive pillars. This improved performance is attributed to the enhanced interaction between the SAW and the continuous magnetostrictive layer, driven by resonance effects within the PnC. These findings highlight the significant potential of incorporating PnCs into SAW sensors for future high‐performance magnetic field sensing. |
| format | Article |
| id | doaj-art-d51f8ad70af84691bb4e1a876d21afbc |
| institution | DOAJ |
| issn | 2751-1219 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Sensor Research |
| spelling | doaj-art-d51f8ad70af84691bb4e1a876d21afbc2025-08-20T02:57:54ZengWiley-VCHAdvanced Sensor Research2751-12192025-05-0145n/an/a10.1002/adsr.202500008Modeling of High‐Sensitivity SAW Magnetic Field Sensors with Au‐SiO2 Phononic CrystalsMohsen Samadi0Jana Marie Meyer1Elizaveta Spetzler2Benjamin Spetzler3Jeffrey McCord4Fabian Lofink5Martina Gerken6Integrated Systems and Photonics Department of Electrical and Information Engineering Kiel University Kaiserstraße 2 24143 Kiel GermanyFraunhofer Institute for Silicon Technology ISIT Fraunhoferstraße 1 25524 Itzehoe GermanyNanoscale Magnetic Materials – Magnetic Domains Department of Materials Science Kiel University Kaiserstraße 2 24143 Kiel GermanyEnergy Materials and Devices Department of Materials Science Kiel University Kaiserstraße 2 24143 Kiel GermanyNanoscale Magnetic Materials – Magnetic Domains Department of Materials Science Kiel University Kaiserstraße 2 24143 Kiel GermanyFraunhofer Institute for Silicon Technology ISIT Fraunhoferstraße 1 25524 Itzehoe GermanyIntegrated Systems and Photonics Department of Electrical and Information Engineering Kiel University Kaiserstraße 2 24143 Kiel GermanyAbstract The development of high‐sensitivity magnetic field sensors is crucial for precise magnetic field detection. In this context, a theoretical model is presented for a highly sensitive surface acoustic wave (SAW) magnetic field sensor incorporating phononic crystal (PnC) structures composed of Au pillars embedded within a SiO2 guiding layer. Rectangular and triangular PnC configurations are studied and their potential for improving sensor performance are assessed. In the design, the PnC is integrated into the SiO2 guiding layer to preserve the continuous magnetostrictive layer, enhancing its interaction with the SAW. Results from the simulations indicate that the proposed sensor can achieve a nearly two orders of magnitude increase in sensitivity compared to a continuous delay line of similar dimensions, and an eightfold improvement over a previous sensor design with PnCs composed of magnetostrictive pillars. This improved performance is attributed to the enhanced interaction between the SAW and the continuous magnetostrictive layer, driven by resonance effects within the PnC. These findings highlight the significant potential of incorporating PnCs into SAW sensors for future high‐performance magnetic field sensing.https://doi.org/10.1002/adsr.202500008magnetic field sensorsmagnetostrictionphononic crystalssurface acoustic waves |
| spellingShingle | Mohsen Samadi Jana Marie Meyer Elizaveta Spetzler Benjamin Spetzler Jeffrey McCord Fabian Lofink Martina Gerken Modeling of High‐Sensitivity SAW Magnetic Field Sensors with Au‐SiO2 Phononic Crystals Advanced Sensor Research magnetic field sensors magnetostriction phononic crystals surface acoustic waves |
| title | Modeling of High‐Sensitivity SAW Magnetic Field Sensors with Au‐SiO2 Phononic Crystals |
| title_full | Modeling of High‐Sensitivity SAW Magnetic Field Sensors with Au‐SiO2 Phononic Crystals |
| title_fullStr | Modeling of High‐Sensitivity SAW Magnetic Field Sensors with Au‐SiO2 Phononic Crystals |
| title_full_unstemmed | Modeling of High‐Sensitivity SAW Magnetic Field Sensors with Au‐SiO2 Phononic Crystals |
| title_short | Modeling of High‐Sensitivity SAW Magnetic Field Sensors with Au‐SiO2 Phononic Crystals |
| title_sort | modeling of high sensitivity saw magnetic field sensors with au sio2 phononic crystals |
| topic | magnetic field sensors magnetostriction phononic crystals surface acoustic waves |
| url | https://doi.org/10.1002/adsr.202500008 |
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