Nonisothermal Phase Transformation of the Glassy Composition TeSe20

Result of differential scanning calorimetry (DSC) at different heating
rates φ = 5, 15, 20, 40, and 50oC/min on glassy composition TeSe20 are
discussed. The characteristic temperatures (the glass transition temperature
(Tg), the crystallization temperature (Tc) and the melting temperature (Tm)) and
the activation energy of crystallization (Ec) were evaluated by two different
models, which are valid to discuss the results of glass-crystalline
transformation but with different accuracies. A cyclic scanning method was
used to investigate the thermally induced phase during two consecutive
heating-cooling cycles covering the temperature range Tg-Tm, which indicates
that the glassy compound TeSe20 could be applied as a memory switching
compound.