Abstract
We investigated the dynamics of free and bound excitonic magnetic polarons in ${\mathrm{Cd}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{Te}$ $(x=0.03)$ single crystals by time-resolved photoluminescence experiments. We found that the magnetic polarons formed from free excitons are more stable than those formed from bound excitons. As a consequence, the peak energies of the optical emissions of free excitons and donor-bound excitons cross in the time-resolved photoluminescence spectra. Furthermore, we observed that nonmagnetic localization is not required to form free magnetic polarons.
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