Abstract
Magnetic contribution to the specific heat, magnetic susceptibility and Mall effect are experimentally studied in Pb1-x-ySnyMnxTe semimagnetic semiconductors with y = 0.72 and x = 0.08 and with different carrier concentrations 10 20 3 x 10 20 cm 3 breaks down with a decreasing concentration of carriers due to an increasing competition between Ruderman-Kittel—KasuyaYoshida and superexchange interactions. PACS numbers: 75.50.Ppa, 75.50.Lk
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