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Proceedings Paper

Ag-Sb-Te system for phase change optical data storage
Author(s): Yagya Deva Sharma; Promod K. Bhatnagar
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Paper Abstract

For phase change optical data storage, several chalcogenide-based materials have been reported and are expected to replace the conventional magnetic disk. In the present work, preparation and characterization of the chalcogenide allow Agx - Sb 2(1-x) - Te 3(1-x) with different composition (x = 0.16, 0.18 and 0.20) has been presented. Samples were prepared using melt quenching technique and the films were grown by thermal evaporation system. The crystallization process of Ag- Sb- Te material was studied using differential thermal analysis (DTA) and Optical analysis (Transmittance and reflectance) respectively. The films were studied for both cases: before and after annealing. The Differential thermal analysis curves were recorded for different compositions and Glass transition temperature (Tg), crystallization temperature (Tc) and melting temperature (Tm) have been obtained. It may also be concluded that Tg/Tm ratio is closer to required condition for phase change optical data storage material. Thermal and optical analysis shows that the Ag - Sb- Te material is a potential candidate for phase change optical data storage. The optimized composition has also been obtained.

Paper Details

Date Published: 11 November 2002
PDF: 9 pages
Proc. SPIE 4779, Advanced Characterization Techniques for Optical, Semiconductor, and Data Storage Components, (11 November 2002); doi: 10.1117/12.453720
Show Author Affiliations
Yagya Deva Sharma, Univ. of Delhi (India)
Promod K. Bhatnagar, Univ. of Delhi (India)

Published in SPIE Proceedings Vol. 4779:
Advanced Characterization Techniques for Optical, Semiconductor, and Data Storage Components
Angela Duparré; Bhanwar Singh, Editor(s)

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