The Ferromagnetic p-d Exchange in Diluted Magnetic Semiconductors

• Authors: J. Blinowski , T. Dietl , P. Kacman
• Languages of publication: EN

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.

Keywords

EN

75.50.Pp; 75.30.-m; 71.70.-d

Discipline

• 71.70.-d: Level splitting and interactions(see also 73.20.-r Surface and interface electron states; 75.30.Et Exchange and superexchange interactions)
• 75.50.Pp: Magnetic semiconductors
• 75.30.-m: Intrinsic properties of magnetically ordered materials(for critical point effects, see 75.40.-s; for magnetotransport phenomena, see 75.47.-m)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1992
• Volume: 82
• Issue: 4
• Pages: 641-644

Dates

published

1992-10

Contributors

author

J. Blinowski

• Institute of Theoretical Physics, Warsaw University, Hoża 69, 00-681 Warszawa, Poland

author

T. Dietl

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland

author

P. Kacman

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland

Identifiers

DOI

10.12693/APhysPolA.82.641