Abstract
The local magnetic behavior of isolated Fe and Ni ions has been studied in the II–VI semiconductors ZnS, ZnTe, and α-MnS by magnetic hyperfine interactions. The configuration of the electrons in the unfilled shells is directly reflected in the magnetic properties. Small orbital contributions to the hyperfine fields are found to be present at both impurities in most hosts. In ZnS as well as in ZnTe, Fe ions are found to be in the 2+ and in the 1+ state after implantation. Ni in ZnS also populates two different charge states. First interpretations are made on the basis of an intermediate ligand field model.
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