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Abstract
The electronic transitions inside the 5 E multiplet of Fe 2+ have been studied by resonant Raman scattering in the diluted magnetic semiconductors Cd 1- x Fe x Te. The experements are performed in a quasi backscattering geometry on single crystals oriented in the (1 1 0) plane. The low temperature Raman spectra display anti-Stokes and Stokes lines at 18.8 cm −1 in Cd 1- x Fe x Te and at 18.2 cm −1 in Zn 1- x Fe x Te. The observed Raman shifts correspond to the excitat of the magnetic dipole transition Γ 1 → Γ 4 induced by the exchange coupling. The line position as well as the polarization features are in good agreement with the theory. Moreover an additional Raman line with a Stokes shift ω L0 + ω Γ 1Γ 4 is clearly observedd at 188.5 cm −1 in Cd 1- x Fe x Te.
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