Abstract
In the present paper, using the discontinuous Ni films and magnetite magnetic fluids as examples we consider theoretically and experimentally the influence of the structural parameters on the optical properties of the ultrafine structures. The optical properties of nanostructures are represented within the theoretical Maxwell-Garnett model. The behavior of the optical spectra of thin Ni films and magnetite magnetic fluids was explained in the framework of the effective medium approximation in two cases: q < 0.5 and 0.5 < q < 1. In this model an effective refractive index (n+ik) of the nanostructures can be calculated as a function of the εm, q, and particle shapes. This approach demonstrated a good accordance between the experimental results and the theoretical calculations.
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