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Effet magnéto-optique et optique des couches minces à base de ferrite de cobalt

N Lamaï, F Royer, JP Chatelon, D Jamon, S Neveu, MF Blanc-Mignon, JJ Rousseau

Abstract


Cette étude a pour but la mesure des effets magnéto-optiques (rotation Faraday) en fonction du champ magnétique appliqué et en fonction de la longueur d’onde, ainsi que la mesure de la transmittance (effet optique) des couches minces à base de ferrite de cobalt. Les résultats montrent une forte rotation Faraday spécifique avec des cycles d'hystérésis et des spectres de transmittance d'une bonne transparence dans la gamme Télécom (≈1550 nm).

Mots-clés: ferrite de cobalt, sol-gel, couches minces, rotation Faraday, transmittance.

 

Magneto-optical effect and optical thin films cobalt ferrite

This study was designed to measure the magneto-optical effect (Faraday rotation) according to the applied magnetic field and a function of the wavelength and the transmittance measurement (optical effect) thin film based on cobalt ferrite. The results show a high specific Faraday rotation with hysteresis cycles and transmittance spectra of a good transparency in the range Telecom (≈1550 nm).

Keywords: cobalt ferrite, sol-gel thin films, Faraday rotation, transmittance.




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