TRANSPORT AND MAGNETIC-PROPERTIES OF PB1-X-YSNYMNXTE (X-LESS-THAN-OR-EQUAL-TO-0.16)

Hall constant, conductivity and magnetic susceptibility of Pb1-x-ySnyM nxTe semimagnetic semiconductor were investigated as a function of Mn content (x = 0.04, 0.09, 0.16, y = (0.7-0.8)) in the temperature range T = (4 - 300) K. A ferromagnetic phase transition takes place at T = 5 K for samples with x = 0.04, at T = 10 K far x = 0.09 and at T = 20 K for x = 0.16. For crystals with x greater than or equal to 0.09 the strong temperature dependence of the Hall constant is observed for tem peratures below 40 K. Magnetic held characteristics of the Hall effect is strongly non-linear at T = 4.2 K. No significant temperature or ma gnetic field dependence of conductivity is observed in the whole tempe rature range studied. The observed transport anomalies are due to the anomalous Hall effect.