Abstract
Alternating differential scanning calorimetry measurements have been undertaken on theGe15Te85−xInx (1≤x≤11) series of glasses. It is found that there is a marginal decrease in the glass transition temperature(Tg) in the compositionrange 1≤x≤3. Abovex = 3, a monotonicincrease is seen in Tg which indicates a continuous build-up in network connectivity andabsence of any nanophase separation. The non-reversing heat flow(ΔHNR) has been found to exhibit a broad trough between the compositionsx = 3 and 7, which clearly indicates the presence of a thermally reversing window inGe15Te85−xInx glasses in thecomposition range 3≤x≤7.X-ray diffraction studies on crystallized Ge–Te–In samples revealthe presence of hexagonal Te, rhombohedral GeTe and monoclinicIn2Te5 phases. An increase is observed in the intensity of theIn2Te5 peaks as a function of indium concentration.
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