Kinetic properties of the Mn$_{1-x}$Gd$_{x}$Se solid solutions

The results of kinetic study of the Mn$_{1-x}$Gd$_{x}$Se chalcogenide solid solutions with different substitute concentrations (0 $\le x \le$ 0.15) in the temperature range of 80–400 K are reported. The difference between the Hall constant and thermopower signs has been found. The electron-type conductivity determined from the Hall constant and hysteresis of the I – V characteristics have been explained by the existence of nanoareas with local electric polarizations. The sharp extrema observed in the temperature dependence of thermopower are explained by splitting of a narrow 4$f$ subband by the crystal field.