Alternating current magnetic susceptibility of ferronematics: The case of high concentration of magnetic nanoparticles

Abstract The dynamic magnetic susceptibility of ferronematics (nematic liquid crystals doped with magnetic nanoparticles) has been measured for high concentrations of nanoparticles. For a given composition of the ferronematic (the same nanoparticles, and the same liquid crystal matrix) we have found the optimal volume concentration of the magnetic particles, for which the largest relative enhancement of the dynamic magnetic susceptibility is obtained upon the application of a bias magnetic field in the isotropic phase.