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1992 | 82 | 4 | 641-644
Article title

The Ferromagnetic p-d Exchange in Diluted Magnetic Semiconductors

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Abstracts
EN
The antiferromagnetic type of the interaction between the Γ_{8}-band electrons and the Mn^{2+} ions in A^{II}B^{IV} diluted magnetic semiconductors has been explained by invoking the p-d hybridization mechanism. In this paper it is shown that for particular electronic configurations of the magnetic ions in diluted magnetic semiconductors the p-d hybridization can lead to a ferromagnetic interaction between the valence-band electrons and the localized spins. This happens when all the one-electron d-orbitals which hybridize with p-band states are empty (e.g., as in Sc^{2+} and Ti^{2+} ions). The appropriate p-d Hamiltonian is derived and the ferromagnetic exchange constants are evaluated.
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Contributors
author
  • Institute of Theoretical Physics, Warsaw University, Hoża 69, 00-681 Warszawa, Poland
author
  • Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland
author
  • Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland
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bwmeta1.element.bwnjournal-article-appv82z417kz
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