The first observation of electric dipole spin resonance of donor electrons in Cd_{1-x}Mn_{x}Te_{1-y}Se_{y} in far-infrared magnetotransmission is reported. Modification of the donor wave function due to non-diagonal exchange interaction with localized magnetic moments and to magnetic fluctuations are believed to allow this resonance. Hopping magnetoconductivity studied in the same crystals shows a behavior typical for wide gap diluted magnetic semiconductors.
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