Crystallization mechanism and kinetics of Cr2Ge2Te6 phase change material. (23rd August 2018) - Hatayama, S.
Abstract: Abstract : The crystallization mechanism and kinetics of Cr2 Ge2 Te6 (CrGT) films were investigated by differential scanning calorimetry. The average Avrami exponent ( n a ) analysis indicated that CrGT exhibits a growth-dominant crystallization in the range of heating rate ( β ) of 10–50°C/min. In comparison, Ge2 Sb2 Te5 (GST) showed a nucleation-dominant crystallization. The n a of CrGT was about 3, and was majorly independent of β . The n a of GST decreased with an increasing β, which asymptotically approached a value of around 3. The kinetic constant of CrGT was evaluated to be almost the same with that of GST, indicating that CrGT undergoes fast crystallization.