Crystallization kinetics of amorphous Se60S20Te20

The temperature and the time dependence of the electrical conductivity (6) of a-Se₆₀S₂₀Te₂₀ are investigated. Conductivity anomalies are observed during the crystallization growth from both the amorphous solid and supercooled liquid phases. The changes of 6 during different isothermal annealing of a-Se₆₀S₂₀Te₂₀ samples with time are used to determine the ratio transformed from amorphous to crystalline. A value of 0.97±0.16 eV has been obtained for the activation energy of the crystal growth in the temperature range of 120–170°C.