Transport and Magnetic Properties of Pb_1-x-ySn_yMn_xTe (x ≤ 0.16)

Abstract

Hall constant, conductivity and magnetic susceptibility of Pb1-x-ySnyMnxTe 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 for x = 0.09 and at T = 20 K for x = 0.16. For crystals with x > 0.09 the strong temperature dependence of the Hall constant is observed for temperatures below 40 K. Magnetic field characteristics of the Hall effect is strongly non-linear at T = 4.2 K. No significant temperature or magnetic field dependence of conductivity is observed in the whole temperature range studied. The observed transport anomalies are due to the anomalous Hall effect.

Magnetic Specific Heat Study of the Competition between Ferro- and Antiferromagnetic Spin-Spin exchange Interactions in PbSnMnTe

“…The Hall effect was measured in the temperature range 4.2 Κ < T < 300 Κ by 4-probe dc technique. In view of the quite strong anomalous Hall effect observed in our samples at helium temperatures, we characterize all our crystals by the carrier concentration at T = 77 Κ [4]. Our crystals were examined by the microprobe analysis and the X-ray Debye method and found to be single-phase and homogeneous.…”