Phys. Rev. Lett. 56, 777–779 (1986)Carrier-concentration–induced ferromagnetism in PbSnMnTeReceived 12 September 1985; published in the issue dated 17 February 1986 The influence of charge-carrier concentration on the magnetic properties of the semimagnetic semiconductor [(PbTe)1-x(SnTe)x]1-y[MnTe] y (x=0.72, y=0.03) is reported. Magnetization, magnetic susceptibility, and specific heat have been measured. For carrier concentrations below p=3×1020 cm-3 the alloy is paramagnetic. For p≥3×1020 cm-3 an abrupt transition to a ferromagnetic phase is observed at helium temperatures. The ferromagnetic transition temperature increases with increasing p. This is the first demonstration of the effect of carrier concentration on the magnetic properties of semimagnetic semiconductors. © 1986 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.56.777
DOI:
10.1103/PhysRevLett.56.777
PACS:
75.30.Cr, 72.20.My, 75.30.Et
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