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Theses

Développement de capteurs magnétiques à base de dispositifs "magnoniques"

Abstract : In a ferromagnetic material exposed to a strong magnetic field, the spin wave describes the propagation of the phase shift of precessing spins at the same frequency over the time. This thesis describes the development of a magnetic sensor, using the variations in the propagation of the spin wave. In recent years, the subject of magnonics has been of great interest in the field of instrumentation and data transmission. Although, several studies have shown a strong potential of magnonics for the design of a magnetic field sensor, few studies have been interested in the realization of such sensors and are limited to the measurement of scattering parameters. This thesis presents a detailed study of the implementation of magnonics devices in a magnetic field sensor. On the basis of theoretical models, the understanding of the phenomenon has allowed to optimize the sensitive element. With the help of characterization measurements (Sparameters) carried out with the VNA, field sensitivities could be estimated. The consistency of the measurements between the S parameters and the measurements made on the sensor has validated the measurement chain implemented. The sensor based mainly on a quadrature I / Q demodulation to monitor the variations of the signal as a function of the magnetic field. This first implementation of YIG material, shows a sensitivity of about 100\,\mathrm{pT\sqrt{Hz}}.
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Submitted on : Tuesday, July 26, 2022 - 1:01:14 AM
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  • HAL Id : tel-03738321, version 1

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Olivier Haas. Développement de capteurs magnétiques à base de dispositifs "magnoniques". Electronique. Normandie Université, 2022. Français. ⟨NNT : 2022NORMC206⟩. ⟨tel-03738321⟩

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