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Unipolar and Bipolar High-Magnetic-Field Sensors Based on Surface Acoustic Wave Resonators

Abstract : While surface acoustic wave (SAW) sensors have been used to measure temperature, pressure, strains, and low magnetic fields, the capability to measure bipolar fields and high fields is lacking. In this paper, we report magnetic surface acoustic wave sensors that consist of interdigital transducers made of a single magnetostrictive material, either Ni or TbFe 2 , or based on exchange-biased (Co=IrMn) multilayers. By controlling the ferromagnet magnetic properties, high-field sensors can be obtained with unipolar or bipolar responses. The issue of hysteretic response of the ferromagnetic material is especially addressed, and the control of the magnetic properties ensures the reversible behavior in the SAW response.
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https://hal.univ-lorraine.fr/hal-01686932
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Submitted on : Wednesday, January 17, 2018 - 10:53:03 PM
Last modification on : Thursday, February 25, 2021 - 11:04:56 AM
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PhysRevApplied.8.024001.pdf
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V. Polewczyk, K. Dumesnil, D. Lacour, M. Moutaouekkil, H. Mjahed, et al.. Unipolar and Bipolar High-Magnetic-Field Sensors Based on Surface Acoustic Wave Resonators. Physical Review Applied, American Physical Society, 2017, 8 (2), ⟨10.1103/PhysRevApplied.8.024001⟩. ⟨hal-01686932⟩

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