Magnetic Polarons

Magnetic polaron, which is the subject of this chapter, is formed by exchange interaction of a carrier spin with localized spins of magnetic ions present in DMSs. It results in ferromagnetic alignment of the localized spins in vicinity of the carrier and can be treated as a magnetic molecule with large magnetic moment. There are stringent requirements if such a molecule is to be stable. The stability and dynamics of exciton magnetic polarons in systems of different dimensionality are considered in this chapter. We show that the stability of magnetic polarons in systems of lower dimensionalities is easier to achieve.