Carrier-concentration-induced ferromagnetism in PbSnMnTe.
نویسندگان
چکیده
The influence of charge-carrier concentration on the magnetic properties of the semimagnetic semiconductor [(PbTe)l-x(SnTe)x]l-y[MnTe]y (x=0.72, y=O.03) is reported. Magnetization, magnetic susceptibility, and specific heat have been measured. For carrier concentrations below p = 3 x 10 cm 3 the alloy is paramagnetic. For p ~ 3 x 1020 cm 3 an abrupt transition to a fer romagnetic 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.
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ورودعنوان ژورنال:
- Physical review letters
دوره 56 7 شماره
صفحات -
تاریخ انتشار 1986