Beschreibung:
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Characteristics of erasable phase-change optical recording media: SbTe-, SbSe-, InTe-, InSe- and GeTe-based thin films and their two binary compounds are reviewed, with particular focus on stability and fast reversibility. We first report that the photo-crystallization dominates in optical recording media since the time required for the transformation is much less than that for the pure thermal crystallization. When photo-crystallization is taken into account, the activation energy for crystallization, <jats:italic>Δ</jats:italic>
<jats:italic>E</jats:italic>, in J-M-A equation should be replaced by an effective activation energy Δ<jats:italic>E</jats:italic>
<jats:sub>eff</jats:sub> which is equal to Δ<jats:italic>E</jats:italic>-\hbar<jats:italic>w</jats:italic>. This substitution will suffice to explain the high speed crystallization, i.e. photo-crystallization.
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