FREE CARRIER-INDUCED FERROMAGNETISM IN STRUCTURES OF DILUTED MAGNETICSEMICONDUCTORS

Ruderman-Kittel-Kasuya-Yosida interaction between localized spins is c onsidered for various dimensionality structures of doped diluted magne tic semiconductors. The influence of this interaction on the temperatu re and magnetic-field dependencies of magnetization and spin splitting of the bands are evaluated in the mean-field approximation. The resul ts show that the hole densities that can presently be achieved are suf ficiently high to drive a paramagnetic-ferromagnetic phase transition in bulk and modulation-doped structures of II-VI diluted magnetic semi conductors.