Magnetic properties of heterophase film coatings based on a solid solution of cadmium sulfide and iron

In this work, we measured and analyzed the magnetic susceptibility and the isotherms of magnetization of a semimagnetic material based on CdS: Fe with nanosized inclusions of FeS and Fe2O3 phases. These measurements made it possible to divide the ferromagnetic and paramagnetic phases. Measurements of magnetic force microscopy showed manifestations of magnetic properties mainly at the boundaries of CdS grains, which is explained by the predominance of the mechanism of diffusion of iron atoms along the boundaries of crystallites. The displacement of Cd atoms with the formation of FeS or the oxidation of Fe to the state of maghemite occurs at the boundaries of these crystallites.