Journal of Surface Engineered Materials and Advanced Technology

Volume 2, Issue 1 (January 2012)

ISSN Print: 2161-4881   ISSN Online: 2161-489X

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Estimate of the Crystallization Kinetics in Stoichiometry Compositions Films of Ge:Sb:Te

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DOI: 10.4236/jsemat.2012.21008    4,740 Downloads   8,250 Views   Citations

ABSTRACT

The aim of this work is to compare the isothermal crystallization kinetic in the films along GeTe-Sb2Te3 line with composition Ge2Sb2Te5, Ge1Sb2Te4 Ge1Sb4Te7 and Ge4Sb1Te5 using mainly Johnson–Mehl–Avrami-Kolmogorov (JMAK) model. Results obtained have shown different crystallization mechanism in the investigated films. In Ge2Sb2Te5 and Ge1Sb2Te4 films the analysis of the kinetic results (Avrani coefficient) showed that at the beginning of crystallization a metastable phase appeared with the Ge1Sb4Te7 composition, this is followed by the nucleation and growth of the stable fcc phase up to full crystallization. In contrast Ge4Sb1Te5 and Ge1Sb4Te7 films show diffusion control growing from small dimension grains with decreasing nucleation rate.

Cite this paper

C. Rodríguez, E. Sanchez, J. Hernández, E. Prokhorov, J. Saldaña and G. Martínez, "Estimate of the Crystallization Kinetics in Stoichiometry Compositions Films of Ge:Sb:Te," Journal of Surface Engineered Materials and Advanced Technology, Vol. 2 No. 1, 2012, pp. 44-46. doi: 10.4236/jsemat.2012.21008.

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