Single crystals of a new diluted magnetic semiconductor Bi2−x FexTe3 (0≤x≤0.08) were grown. For all crystals, the transition into a ferromagnetic state with easy axis parallel to the C 3 axis was observed at temperature T c increasing with iron concentration and reaching 12 K at x=0.08. An increase in the Seebeck coefficient, anomalous Hall effect, and resistivity jump at T=T c were also observed. The frequency of the de Haas-van Alphen oscillations decreases with increasing x, indicating the donor properties of Fe.
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Kulbachinskiı̆ et al. (2001) studied this question.
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