Control of the magnetic response in magnetic field SAW sensors

Surface acoustic wave devices including magnetic materials have been shown to be useful to build up magnetic sensors. In the resonator geometry, we take advantage of the shape of the electrodes to engineer the response of the device. We studied theoretically and experimentally the response when the field is applied in the device plane, perpendicular to the electrode length. We show that the field range of measure can be adapted, for the same material, by changing either the thickness of the electrodes or their width.