Magnetic properties of Pb1−xMnxTe

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Abstract
Magnetic and transport properties of Pb1−xMnxTe have been investigated for Mn concentrations xTg have been studied in detail. Although the materials are p type with hole concentrations ranging from 6×1016 to 6×1019 cm−3, the Ruderman–Kittel–Kasuya–Yosida interaction does not affect significantly the magnetic properties. We attribute the spin glass properties to the interband exchange interactions, which are long range in a small gap semiconductor like Pb1−xMnxTe. The transport experiments give evidence to a strong deformation of the valence band upon introduction of Mn in the matrix. In particular, the experimental data are compatible with a crossing between valleys of the valence band at L points and valleys along the Σ axis of the Brillouin zone.