Based on the ellipsometric observation of the phase change of stoichiometric Ge–Sb–Te at moderately elevated temperature, we find that the kinetics of crystallization of Ge–Sb–Te is described by the modified Johnson–Mehl–Avrami (JMA) equation, which implies that the first stage of cascaded crystallization of Ge–Sb–Te is a true nucleation-dominated process such that the formation of nuclei is stimulated by preexisting nuclei.
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An et al. (2002) studied this question.
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