Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1484316 | Journal of Non-Crystalline Solids | 2008 | 6 Pages |
Alternating differential scanning calorimetric (ADSC) studies and electrical switching experiments have been undertaken on Al15Te85−xSix (2 ⩽ x ⩽ 12) system of glasses. These glasses are found to exhibit two crystallization reactions (Tc1 and Tc2), for compositions with x < 8. Above x = 8, a single-stage crystallization is seen. Further, a trough is seen in the composition dependence of non-reversing enthalpy (ΔHNR), based on which it is proposed that there is a thermally reversing window in Al15Te85−xSix glasses, in the composition range 4 ⩽ x ⩽ 8. Electrical switching studies indicate that Al15Te85−xSix glasses exhibit a threshold type electrical switching at ON state currents less than 2 mA. Further, the switching voltages are found to increase with the increase in silicon content. It is interesting to note that the start (x = 4) and the end (x = 8) of the thermally reversing window are exemplified by a kink and a saturation in the composition dependence of switching voltages, respectively.