Detection and Imaging of Magnetic Field in the Low-Frequency Regime Using a Ferromagnetic Thin Film Coated With a Thermo-Fluorescent Layer

Hugo Ragazzo (1) , Daniel Prost (1) , Jean-François Bobo (2) , Stéphane Faure (3) , Alexis Chevalier (4)

1 DEMR, ONERA, Université de Toulouse [Toulouse]
2 CEMES - Centre d'élaboration de matériaux et d'études structurales
3 LPCNO - Laboratoire de physique et chimie des nano-objets
4 Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance

A novel and original method of LF magnetic field imaging is presented, that uses a magnetic thin film coated with fluorescent dye. Due to high permeability and consequent hysteresis losses, the film is heated by the field. As the fluorescence of the coated material is temperature-dependent, magnetic field mapping can be obtained in a short time and on a large surface by recording images with a S-CMOS camera. This principle had been previously presented in the microwave regime, for both electric and magnetic fields imaging; here we propose first results in the low frequency regime (kHz frequency range).

Mots clés: Magnetic field imaging; thermography; thermo-fluorescence; magnetic coil

Mots clés: CHAMP MAGNETIQUE; IMAGERIE; RESONANCE MAGNETIQUE

Domaines: Instrumentations et Détecteurs [physics.ins-det]; Electromagnétisme; Matériaux

Hugo Ragazzo, Daniel Prost, Jean-François Bobo, Stéphane Faure, Alexis Chevalier. Detection and Imaging of Magnetic Field in the Low-Frequency Regime Using a Ferromagnetic Thin Film Coated With a Thermo-Fluorescent Layer. IEEE Transactions on Magnetics, 2021, 57 (3), ⟨10.1109/TMAG.2020.3045137⟩. ⟨hal-03182667⟩