Abstract
The effects of d—d exchange interaction have been studied by measuring high-field Faraday rotation in II—VI-based semimagnetic semiconductors. For Cd 1− x Mn x Te crystals with x = 0.43 and at room temperature a saturation in magnetic field dependence of the Faraday rotation has been observed. In the case of low temperature ( T = 4.2 K) and low Mn content ( x = 0.05), two steps for Cd 1− x Mn x Te and one step for Cd 1− x Mn x Se have been found on this dependence. These steps are interpreted by the nearest-neighbour cluster model. The evaluated exchange constant J NN is in agreement with direct magnetization measurements. Peculiarity of high-field Faraday rotation in Fe- and Co-based semimagnetic semiconductors has been discussed.
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