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Magnetic susceptibility and Hall effect in Pb1−x−ySnyMnx semimagnetic semiconductor with 0.03 ⩽ x ⩽ 0.12 were investigated as a function of carrier concentration. At low temperatures a ferromagnetic phase was observed in the samples with a high carrier concentration. The dependence of the Curie temperature Tc on the carrier concentration p has a threshold-like character for all investigated samples...
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