The study of the structural characteristics, electrical and magnetic properties was carried out on synthesized samples of vanadium diselenide intercalated with chromium atoms. Structural studies have shown a decrease in the symmetry of the crystal lattice from hexagonal to monoclinic with an increase in the concentration of intercalated atoms, caused by their ordering in the Van der Waals gap. In this case, a change in the resistive state occurs in samples of different compositions, which are characterized by opposite thermal coefficients of electrical resistance. The values of the effective magnetic moments of chromium ions in CrxVSe2 decrease in comparison with the spin characteristics with an increase in the chromium content and correlate with the concentration dependence of the parameter c of the unit cell. At low temperatures for compositions х> 0.2, the compounds undergo a transition to the state of a spin glass with a critical temperature of up to 30K.

The electrical and magnetic properties were measured on polycrystalline samples of niobium diselenide intercalated with gadolinium atoms. The dependences of the electrical resistance on temperature point to a predominantly phonon scattering mechanism for charge carriers, while the concentration dependences are determined by increasing scattering by interstitial atoms. The magnetic properties of GdxNbSe2 (0≤x≤0.33) were studied in the temperature range of 2–350 K and in the range of magnetic fields up to 70 kOe. Based on the results of studies of magnetic susceptibility and magnetization, the possibility of the existence of antiferromagnetic interactions in the studied compounds and the phenomenon of spin reorientation in a magnetic field are shown. The observed decrease in the effective magnetic moment of gadolinium ions with an increase with their concentration is discussed in terms of a possible intramolecular exchange.