Magnetic susceptibility studies of Zn1-xFexSe and Zn1-xFexS
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The magnetic susceptibility of diluted magnetic semiconductors Zn1-xFexSe and Zn1-xFexS has been calculated within a crystal field model and by applying the extended nearest-neighbour pair approximation. The results are compared with available experimental data. It appears that a good agreement between theory and experiment is obtained for Zn1-xFexSe laking the long-range exchange comprising several nearer interionic distances, whereas in Zn1-xFexS the exchange interaction with nearest-neighbours alone gives a better solution. (C) 1999 Elsevier Science B.V. All rights reserved.