Abstract
We have investigated microscopic magnetic spin states (MMSSs) (“loose spins, finite superparamagnetic, ‘locked’ and infinite clusters”) both above and below the freezing temperature in Cd0.70Mn0.30Te spin glass (SG). We used the localized exciton magnetic polarons, which we observed in the photoluminescence spectra, as a probe. This makes it possible to estimate the MMSS's relative concentrations and to study their temperature evolution and thus to elucidate one of the most important issues in this field of research. Furthermore, the findings described here open new prospects for further studies of spin freezing in the different SGs, especially, in dilute magnetic semiconductors.
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