Impact of Magneto-optical Properties Depending on the Orientation in the Plane of Cobalt Ferrite Locked in a Silica Matrix
Nandiguim Lamaï *
Mechanical Engineering Departement, Higher National Institute of Sciences and Technology of Abéché (INSTA), Abéché, OuaddaÏ, Chad.
Désiré Allassem
Mechanical Engineering Departement, Higher National Institute of Sciences and Technology of Abéché (INSTA), Abéché, OuaddaÏ, Chad.
Alexis Mouangué Nanimina
Mechanical Engineering Departement, Higher National Institute of Sciences and Technology of Abéché (INSTA), Abéché, OuaddaÏ, Chad.
Djimako Bongo
Higher Normal School of Technology of Sarh, Moyen-Chari, Chad.
Togdjim Jonas
Mechanical Engineering Departement, Higher National Institute of Sciences and Technology of Abéché (INSTA), Abéché, OuaddaÏ, Chad.
*Author to whom correspondence should be addressed.
Abstract
In this work, we discuss the magneto-optical properties according to the orientation of 15nm-sized cobalt ferrite blocked in a silica matrix in comparison to the study done on 20nm-sized cobalt ferrite. This measurement shows that it is possible to increase the remanence of the Faraday effect by creating a magnetic orientation in the solid matrix, which is interesting for the production of self-polarized components. In addition, this remanence is greater for 15 nm than for 20 nm.A gelation field applied perpendicular to the plane of the layer therefore produces a preferential orientation of the magnetic moments in the direction of the field applied during the measurement.
Keywords: Magnetic liquids, thin layers, cobalt ferrite, sol-gel, Faraday rotation.