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Kinetic Exchange Vs. Room Temperature Ferromagnetism in Diluted Magnetic Semiconductors
Published online by Cambridge University Press: 17 March 2011
Abstract
Guided by the internal-reference rule and the known band o sets in - and - diluted magnetic semiconductors, we discuss the feasibility of obtaining p-type conductivity, required for the carrier-induced ferromagnetism, as well as the cases for which the doping by shallow impurities may lead to the ferromagnetism driven by the double exchange. e consider the dependence of kinetic exchange on the p-d hybridization, on the electronic con gurations of the magnetic ions, and on the energies of the charge transfer betw een the valence band of host materials and the magnetic ions. n the case of n-based - compounds, the doping by acceptors is necessary for the hole-induced ferromagnetism. he latter is, how ever, possible without any doping for some of Mn-, Fe- or Co-based - magnetic semiconductors. n nitrides with Fe or Co carrier-induced ferromagnetism with TC > 300 is expected in the presence of acceptor doping.
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- Copyright © Materials Research Society 2002
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