Browsing by Author "Ahmad, M."
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Effect of composition on optical constants of Pb: GeSbTechalcogenide thin films
Kumar, J.; Kumar, P.; Suri, N.; Ahmad, M.; Thangaraj, R.; Sathiaraj, T.S. (2008)Optical properties of Pb doped ternary Ge-Sb-Te chalcognide films prepared by thermal evaporation have been studied in the visible and near-infrared spectral regions. The straightforward analysis proposed by Swanepoel has ... -
Heterogeneous crystallization and composition dependence of optical parameters in Sn–Sb–Bi–Se chalcogenides
Ahmad, M.; Thangaraj, R.; Sathiaraj, T.S. (Springer, 2010)Bulk samples of Sn10Sb20-xBixSe70 (0 B x B 8) chalcogenide alloys were prepared by the conventional melt quenching technique. Thin films were prepared on wellcleaned glass substrates by thermal evaporation technique. ... -
Phase segregation in Pb:GeSbTe chalcogenide system
Kumar, J.; Ahmad, M.; Chander, R.; Thangaraj, R.; Sathiaraj, T.S. (EDP Sciences. http://www.epjap.org/, 2008)Effect of Pb substitution on the amorphous-crystalline transformation temperature, optical band gap and crystalline structure of Ge2Sb2Te5 has been studied. In Pb:GeSbTe chalcogenide films prepared by thermal evaporation, ... -
Phase segregation in Pb:GeSbTe chalcogenide system
Kumar, J.; Ahmad, M.; Chander, R.; Thangaraj, R.; Sathiaraj, T.S. (EDP Sciences, 2008)Effect of Pb substitution on the amorphous-crystalline transformation temperature, optical band gap and crystalline structure of Ge2Sb2Te5 has been studied. In Pb:GeSbTe chalcogenide films prepared by thermal evaporation, ... -
Thermal annealing dependence of some physical propertiesof Bi-substituted Sn–Sb–Se glassy thin films
Ahmad, M.; Thangaraj, R.; Sathiaraj, T.S. (EDP Sciences, 2009)Bulk glasses of the Sn10Sb20−xBixSe70 (0 x 8) system were prepared by the conventional melt quenching technique. Thin films were prepared by the thermal evaporation technique on glass substrates. Appearance of some ...