Open AccessMeasurement of Dielectric and Magnetic Constants of Ferrofluid-Doped Sol-Gels by a Resonant Cavity Method
Author(s) -
B. Mahamout Mahamat,
O. B. Arafat,
B. Sauviac,
M.-F. Blanc-Mig,
Sophie Neveu,
Didier Vincent,
F. Royer
Publication year - 2021
Publication title -
current journal of applied science and technology
Language(s) - English
Resource type - Journals
ISSN - 2457-1024
DOI - 10.9734/cjast/2021/v40i3931594
Subject(s) - ferrofluid , materials science , dielectric , permittivity , sol gel , maghemite , permeability (electromagnetism) , doping , characterization (materials science) , composite material , nuclear magnetic resonance , analytical chemistry (journal) , magnetic field , optoelectronics , nanotechnology , chemistry , chromatography , nanoparticle , biochemistry , physics , quantum mechanics , membrane
Materials with specific electromagnetic properties are increasingly used for the realization of passive components. Therefore, electromagnetic characterization is a priority to know these materials properties. This study focuses on the electromagnetic characterization of 10 nm maghemite ferrofluid doped sol-gel using a resonant cavity method. We deposited the sol-gel by dipping/removal on an alumina substrate in order to make measurements on the cavity to determine the complex permittivity and permeability. Two studies were carried out; the first consisted in varying the doped sol-gel thickness of layers of the same concentration in the realization of samples; and the second consisted in varying the volume concentration of ferrofluid according to the matrix dimensions. The first study showed that the dielectric constants do not vary with the thickness of the magnetic sol-gel layers. In the second study, measurements also showed that the gyromagnetic resonance is the same for all samples regardless of the ferrofluid volume concentration.