Recent High-Field Work on Diluted Magnetic Semiconductors
Magnetic polarons are ferromagnetic spin clusters created by the exchange interaction of a carrier spin (electron or hole) with localized spins embedded in a semiconductor lattice. They were first studied in magnetic semiconductors ; more recently, there have been extensive investigations  of polaron behavior in diluted magnetic semiconductors (DMS), such as Cd1-xMnxTe. DMS are favorable media for magnetic polaron studies because they have simple s-p bands, excellent optical properties, and can be grown in large single crystals. Two types of magnetic polarons have been identified in DMS — the bound magnetic polaron (BMP), whose carrier is localized by an impurity , and the free polaron (FP) consisting of a carrier trapped by its own, self-consistently-maintained, exchange potential .
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