INFLUENCE OF THE MN2-SPECTRUM OF ZN1-XMNXTE( ION CLUSTER FORMATION ONTHE EPR)

The second and fourth central moments of the EPR line of the Mn2+ ion clusters are calculated for the case when isotropic and anisotropic su perexchange interactions exist between paramagnetic ions. The infinite -temperature linewidth for each type of the cluster is found taking Lo rentzian lineshape function. Using cluster-method calculations of cent ral moments, infinite-temperature EPR linewidth in Zn1-xMnxTe is evalu ated for x less than or equal to 0.20, and the results are compared wi th the theory of the EPR line broadening developed for randomly dilute d magnetic semiconductors. The cluster-method approach to the EPR line width offers an explanation of the narrow resonance observed in Zn1-xM nxTe for x > 0.20. (C) 1996 Academic Press, Inc.