Abstract
Ag3.54In10.62Sb49.56Te36.28 alloy has been prepared by melt-quench method. X-ray diffraction (XRD) and Raman spectroscopy have been used to investigate phase homogeneity, crystal structure and effect of laser irradiation. The muliphase nature of Ag3.54In10.62Sb49.56Te36.28 alloy and the presence of AgIn3Te5 and Sb8Te3 phases have been revealed by Rietveld refinement of crystal structure. Raman spectroscopy combined with optical microscopy has been used to understand the vibrational modes and the distribution of the phases identified on the surface of the samples. The results obtained from spectroscopic analysis have substantiated the results of Rietveld refinement. Interaction of 20 mW laser beam with samples has also been investigated using Raman measurements. The results revealed that the regions with large phase fraction of AgIn3Te5 become amorphous during laser-sample interaction, but the starting phase remains nearly the same after interaction. Regions with AgIn3Te5 and nearly equal or larger amount of Sb8Te3 have shown significant growth of α-Sb2O3 during and after laser-sample interaction. These observations have been explained based on the maximum temperature rise at different regions during laser-sample interaction.
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