INFLUENCE OF THE SIZE, SHAPE AND CONCENTRATION OF MAGNETIC PARTICLES ON THE OPTICAL PROPERTIES OF NANO NICKEL THIN FILMS

Abstract

In the present paper, using the discontinuous Ni films as examples we consider theoretically and experimentally the influence of the structural parameters on the optical properties of the ultrafine structures. The optical spectra strongly depend on composition and dielectric constants of particles and matrix. In its turn the dielectric constants are functions of the structural and electronic parameters and can differ from those for corresponding bulk materials. Thus optical spectra investigations can give very useful information about structural parameters of the ultrafine structures. The behavior of the optical spectra of thin Ni films was explained in the framework of the effective medium approximation. These calculations proved a good agreement between the experimental and the theoretical results.