Numerical study of the effect of magnetic fields in dissolution of silicon into germanium melt

Kidess, A.; Armour, N.; Dost, S.

doi:10.1016/j.jcrysgro.2009.10.015

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…The application of magnetic field as an external force on the solvent region has been widely practiced for producing single bulk crystals of the semiconductor alloys. It has been reported that the presence of the axial magnetic field smoothen the concentration profile [102]. Some have shown that the magnetic field had a significant influence on the flow structure and can also damp and or enhance the mixing process so it can be a tool for tuning the melt flow [103].…”

Section: Three Dimensional Model Under Non-linear Temperature Profile In Microgravity Condition By Simulation In (Fea)mentioning

confidence: 99%

A Study on Radial and Axial Temperature Effects on the Growth of Bulk Single Crystal of SixGe1-x in Bridgman Setting

Shemirani¹

2021

Preprint

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This research explores simulation of the growth of large diameter single bulk crystals of silicon and germanium alloy from its melt utilizing Bridgman method. Producing homogeneous single bulk crystals requires a good understanding of the thermo-solutal behavior in the solvent region. This study also suggests certain fundamental scientific aspects of this alloy system which are not well considered to date, and which underlie both the homogeneity and obtaining relatively flat solid liquid interface of the SixGe1-x alloy. These aspects are the diffusion and transport of silicon and germanium in the molten alloy. Both three and two dimensional numerical simulations of thermo-solutal convection in solvent region were examined. The whole simulation scheme was applied to a cylindrical model representing the sample to investigate the aforementioned phenomena in the entire process. It was found that the application of axial magnetic field had no significant effect on the buoyancy driven convection in the solvent region. However, conducting the microgravity environment simulation has shown that the removal of the gravitational force on the solvent region would result in a homogeneous solidification. As an alternative, this study has found that both axial and radial temperature gradients play a role in the solidification process. Controlling this phenomenon, along with two other factors such as applied uniform temperature and reduced pulling rate, would help achieve a homogeneous single bulk crystal with more uniform silicon distribution in the solvent region, more specifically near the solid liquid interface and produce a flat shape interface which is most desired shape in industry.

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Section: Three Dimensional Model Under Non-linear Temperature Profile In Microgravity Condition By Simulation In (Fea)mentioning

confidence: 99%

A Study on Radial and Axial Temperature Effects on the Growth of Bulk Single Crystal of SixGe1-x in Bridgman Setting

Shemirani¹

2021

Preprint

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show abstract

“…The thermal expansion of the alloy during phase change and cooling and diffusion in the solid are neglected. Note that this model is independent of the diffusion coefficient of Si in the Ge-rich GeSi melt for which the coefficient is not well known [19]. The accuracy on the prediction of this model depends solely on the precise determination of the GeSi phase diagram.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

Macrosegregation in vertical Bridgman grown Ge1−xSix alloy with large melt volume: Limit of complete mixing

Woodacre

Labrie

Saghir

2011

Journal of Crystal Growth

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Numerical investigation of growth interface shape and compositional distributions in SiGe crystals grown by the TLZ method in the International Space Station

Baba

Nakamura

Mikami

et al. 2021

Journal of Crystal Growth

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Numerical study of the effect of magnetic fields in dissolution of silicon into germanium melt

Cited by 3 publications

References 13 publications

A Study on Radial and Axial Temperature Effects on the Growth of Bulk Single Crystal of SixGe1-x in Bridgman Setting

A Study on Radial and Axial Temperature Effects on the Growth of Bulk Single Crystal of SixGe1-x in Bridgman Setting

Macrosegregation in vertical Bridgman grown Ge1−xSix alloy with large melt volume: Limit of complete mixing

Numerical investigation of growth interface shape and compositional distributions in SiGe crystals grown by the TLZ method in the International Space Station

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