Exchange interactions in CdFeTe semimagnetic semiconductors

The exchange splitting of the free exciton in diluted Cd 1- x Fe x Te ( x < 0.04) is studied by magnetoabsorption experiments carried out at T = 1.8 K, up to B = 7T. The four Zeeman-like components of the exciton spectrum are observed in circular polarization for magnetic field oriented along the...

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Bibliographic Details
Published in:Solid state communications 1991, Vol.78 (7), p.659-663
Main Authors: Testelin, C., Rigaux, C., Mycielski, A., Menant, M., Guillot, M.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Exchange and superexchange interactions
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Physics
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Summary:The exchange splitting of the free exciton in diluted Cd 1- x Fe x Te ( x < 0.04) is studied by magnetoabsorption experiments carried out at T = 1.8 K, up to B = 7T. The four Zeeman-like components of the exciton spectrum are observed in circular polarization for magnetic field oriented along the principal crystallographic directions. The comparison between the energy splittings and the magnetization data, analyzed in terms of the crystal field model, yields accurate values for the conduction and valence exchange parameters: N 0 α = 0.30 ± 0.04 eV, N 0 β = −1.27 ± 0.08 eV.
ISSN:0038-1098
1879-2766
DOI:10.1016/0038-1098(91)90397-E