The spectra of the effects of birefringence, dichroism and transmission spectra of magnetic fluids with different aggregative stability under the influence of a constant magnetic field were experimentally studied. A change in the complex refractive index of aggregates of magnetite nanoparticles during their growth was discovered. An interpretation of the spectral features of optical anisotropy and light transmission in aggregation-unstable magnetic fluids is proposed.
Vivchar et al. (Wed,) studied this question.