Thermodynamic and Structural Insights into Se–Te–Sn–In Chalcogenide Glasses Using Specific Heat Analysis

Abstract

The specific heats of glassy Se90-xTe5Sn5Inx (0, ≥x≤ 9) alloys have been investigated at different heating rates under non isothermal conditions using differential scanning calorimetry (DSC). The specific heats corresponding to the equilibrium liquid state Cpe (after Tg), the glassy state Cpg (before Tg), Cp0 (at peak value of Tg) and ΔCpg (the difference Cpe and Cpg) were examined with different indium concentration. All these specific heat values exhibit compositional dependence and attain a maximum values at 9 at.% In. The observed variations are interpreted on the basis of the intrinsic specific heats of Se and In (indium) at room temperature and structural changes.