Abstract
Concentration dependences of the mid-IR kinetic of luminescence at 5 E↔ 5 T 2 transition in Fe:ZnSe and Fe:ZnS laser samples were studied in 14–300 K temperature ranges. Radiation lifetime in Fe:ZnSe samples measured using low doped samples with iron concentration 0.1×10 18 cm −3 was estimated to be 57 μs. The magnetic susceptibility for higher doped ( C Fe=38 and 112×10 18 cm −3) Fe:ZnSe samples was found to consist of a paramagnetic Curie–Weiss behavior arising from the weakly interacting Fe 2+ ions and a diamagnetic ZnSe contribution plus a temperature-independent, field-dependent contribution possibly arising from very small amounts of aggregated Fe.
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