Nonuniform Magnetic States and Electrical Properties of SmXMn1-XS Solid Solutions

The real and imaginary parts of magnetic permeability at the three frequencies 100 Hz, 1 kHz and 10 kHz and magnetic moment in magnetic field H = 0.05 T in the SmXMn1-XS(0.1 <= X <= 0.25) solid solutions at the temperatures 5 K-300 K were measured. Magnetization curves were measured in the range of fields -9 T < H < 9 T at the temperatures T = 5 K, 50 K. Non-linear behavior of the magnetization versus field, residual magnetic moment, logarithmic dependence of imaginary parts of the magnetic permeability maximum on frequency and sharp drop of Im(mu) at T < 40 K for compound Sm0.25Mn0.75 S were found. The electrical resistivity of the SmXMn1-X S(0.5 < x < 0.25) solid solution in the range of temperatures 80 K-300 K were measured. Minimum and maximum in the temperature dependence of the resistivity were found respectively at T = 220 K for X = 0.15 and at T = 100 K for X = 0.2 compounds. This behavior is explained a result of the mobility edge movement and the disorder of the deformation and spin density fluctuations with short-range order.