Transport and Magnetic Properties of Pb1-xMnxTe Doped with Cr and Mo

A.I. Artamkina, A.E. Kozhanova, M. Arciszewskab, W.D. Dobrowolskib, T. Storyb, E.I. Slynkoc, W.E. Slynkoc and D.R. Khokhlova aM.V. Lomonosov Moscow State University, Vorobjevy Gory, 1, Moscow 119992, Russia bInstitute of Physics, Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland cChernovtsy Division of Institute of Problems of Semiconductor Material Science, National Ukrainian Academy of Sciences, I. Vilde, 5, Chernovtsy 274001, Ukraine

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Transport and magnetic properties of Pb1-xMnxTe (x<0.18) semiconductor alloys doped with Cr or Mo are investigated in a broad range of temperatures and magnetic fields. In PbMnTe(Cr) alloys the Fermi level may be pinned either in the conduction band or in the energy gap, depending on Mn concentration. In PbMnTe(Mo) alloys the pinning of the Fermi level is observed in the valence band as well as in the energy gap. In the latter case persistent photoconductivity is observed at low temperatures. The analysis of the temperature dependence of magnetic susceptibility shows that PbMnTe alloys doped with Cr or Mo are Curie-Weiss paramagnets revealing weak antiferromagnetic interactions between magnetic ions.

DOI: 10.12693/APhysPolA.106.223 PACS numbers: 71.28.+d