Macrosegregation in vertical Bridgman grown Ge sub(1-x)Si sub(x) alloy with large melt volume: Limit of complete mixing

Vertical Bridgman growth of GeSi alloy with an average Si composition of 15 atom% was performed on a large 25 mm diameter by 90 mm long melt volume to significantly increase the buoyancy-driven convection within the melt. For one sample, the longitudinal Si composition along the sample length is des...

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Published in:Journal of crystal growth 2011-07, Vol.327 (1), p.35-41
Main Authors: Woodacre, J K, Labrie, D, Saghir, M Z
Format: Article
Language:English
Subjects:
Bridgman method
Buoyancy
Germanium
Mathematical models
Melts
Phase diagrams
Silicon
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Saghir, M Z
description Vertical Bridgman growth of GeSi alloy with an average Si composition of 15 atom% was performed on a large 25 mm diameter by 90 mm long melt volume to significantly increase the buoyancy-driven convection within the melt. For one sample, the longitudinal Si composition along the sample length is described by a simple one-dimensional model including complete mixing of the Ge and Si melt constituents and the equilibrium Si segregation coefficient given by the GeSi phase diagram. The excellent agreement between theory and experiment shows that the GeSi phase diagram in the Ge-rich region is determined accurately.
doi_str_mv 10.1016/j.jcrysgro.2011.06.019
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subjects Bridgman method
Buoyancy
Germanium
Mathematical models
Melts
Phase diagrams
Silicon
title Macrosegregation in vertical Bridgman grown Ge sub(1-x)Si sub(x) alloy with large melt volume: Limit of complete mixing
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