Abstract
Mössbauer absorption and emission experiments have been performed on 57Fe impurities in ZnTe. Raman relaxation rates in Fe 3d 6(Fe 2+) ions are found at least 100 times larger in ZnTe than those previously measured in ZnS. A transient Fe 3d 7(Fe 1+) charge state has been observed in emission spectra below 130 K. The Fe 1+-Fe 2+ transition process involves an activation energy of 0.09±0.02 eV. Below 50 K the evolution of the spectra is compatible with the appearance of a new charge state Fe 3d 8(Fe 0). An increased “p” character source shows lines associated with Fe 3d 5(Fe 3+) and Fe 3d 6(Fe 2+).
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