Structure factor of colloidal magnetic fluid

Abstract

Abstract We determined with Langevin dynamics simulations the structure factor of a monodisperse ferrofluid as a function of the density of the suspension, and dipole strength in the particles valid for hard ferrofluids. The structure factor shows the transition from a liquid-like ordering of the particles at low density and dipole moment up to the formations of chain structures at high dipole strength. The collective diffusion coefficient shows a decaying dependence on the dipole moment magnitude for low density of colloid, however, at a high density, such a dependence gets reversed, and the diffusion increases with the dipole moment.