Phase transformation in Pb:GeSbTe chalcogenide films

J. Kumar; P. Kumar; M. Ahmad; R. Chander; R. Thangaraj; S. Sathiaraj

doi:10.1051/epjap:2008165

Phase transformation in Pb:GeSbTe chalcogenide films

J. Kumar, P. Kumar, M. Ahmad, R. Chander, R. Thangaraj, S. Sathiaraj

Physics & Astronomy

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

A comprehensive analysis on the amorphous to crystalline phase transformation in Pb:GeSbTe chalcogenide alloy has been discussed. The structure identified with X-ray measurements has been discussed in relation to thermal analysis carried out on bulk samples. Optical constants have been calculated in the 350 to 800 nm wavelength range, using Fresnel's equation. The effect of Pb substitution on the optical contrast in terms of change in reflectivity and optical parameters (viz. refractive index, extinction coefficient) has been discussed. Marginal decrease in the optical contrast has been observed with a small increase in Pb content, which is effective to maintain the sufficient signal to noise ratio for optical phase-change storage.

Original language	English
Pages (from-to)	117-123
Number of pages	7
Journal	EPJ Applied Physics
Volume	44
Issue number	2
DOIs	https://doi.org/10.1051/epjap:2008165
Publication status	Published - Nov 1 2008

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics

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10.1051/epjap:2008165

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AU - Sathiaraj, S.

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N2 - A comprehensive analysis on the amorphous to crystalline phase transformation in Pb:GeSbTe chalcogenide alloy has been discussed. The structure identified with X-ray measurements has been discussed in relation to thermal analysis carried out on bulk samples. Optical constants have been calculated in the 350 to 800 nm wavelength range, using Fresnel's equation. The effect of Pb substitution on the optical contrast in terms of change in reflectivity and optical parameters (viz. refractive index, extinction coefficient) has been discussed. Marginal decrease in the optical contrast has been observed with a small increase in Pb content, which is effective to maintain the sufficient signal to noise ratio for optical phase-change storage.

AB - A comprehensive analysis on the amorphous to crystalline phase transformation in Pb:GeSbTe chalcogenide alloy has been discussed. The structure identified with X-ray measurements has been discussed in relation to thermal analysis carried out on bulk samples. Optical constants have been calculated in the 350 to 800 nm wavelength range, using Fresnel's equation. The effect of Pb substitution on the optical contrast in terms of change in reflectivity and optical parameters (viz. refractive index, extinction coefficient) has been discussed. Marginal decrease in the optical contrast has been observed with a small increase in Pb content, which is effective to maintain the sufficient signal to noise ratio for optical phase-change storage.

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Phase transformation in Pb:GeSbTe chalcogenide films

Abstract

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