Сomposite films containing semimagnetic semiconductor  nanoparticles have been prepared by different physical and chemical techniques. Cd_1-xMn_xTe based films were fabricated by RF magnetron sputtering from a composite target. The incorporation of semiconductor nanoparticles into the SiO₂ matrix was achieved with a pulsed laser deposition technique. A new chemical approach for the synthesis of Cd_1-xMn_xS nanoparticles in a polymer matrix of polyvinylalcohol has been proposed. A similar polymer matrix was used also for embedding of Pb_1-xMn_xI₂ and Zn_1-xMn_xO nanoparticles. The optical absorption edge for Cd_1-xMn_xTe nanoparticles and the exciton structure in the spectra of Cd_1-xMn_xS, Pb_1-xMn_xI₂, Zn_1-xMn_xO nanoparticles shifted to the higher-energy side compared to those for bulk crystals due to the quantum confinement effect. The magneto-optical Faraday effect for non-magnetic semiconductor/glass nanocomposites demonstrate only small changes as compared with that of bulk semiconductors. The revealed peculiarities in spectral and magnetic field dependence of the Faraday rotation for the semimagnetic semiconductor based composite films can be attributed to the influence of the dimensionality on spin exchange parameters for such kind of nanostructures. According to the magnetic field dependence of the Faraday rotation all the studied composite samples exhibit paramagnetic behaviour. The magneto-optical properties of the nanocomposites suggest possible applications for optical isolators and magnetic sensors.  The work was supported by a grant from the Ministry of Education and Science of Ukraine.

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