TY  - EJOU
AU  - Lan, C. W. 
AU  - Yeh, B. C. 

TI  - Effects of Rotation on Heat Flow, Segregation, and Zone Shape in a Small-scale Floating-zone Silicon Growth under Axial and Transversal Magnetic Fields
T2  - Fluid Dynamics \& Materials Processing

PY  - 2005
VL  - 1
IS  - 1
SN  - 1555-2578

AB  - The suppression of unstable Marangoni convection in floating-zone crystal growth by magnetic fields has enjoyed over recent years a widespread use as a reliable and useful strategy. A transversal direction of the field is particularly efficient, but asymmetric zone shapes and thus segregation are induced. Counter-rotation of the feed and of the crystal rods is a common way to improve dopant homogeneity. However, its effects under magnetic fields are complex and have not yet been studied in detail. In the present analysis, three-dimensional (3D) simulations based on a finite-volume/multigrid method are used to illustrate the effects of rotation on the heat flow, dopant segregation, and the zone shape for a small-scale floating-zone silicon growth under both axial and transversal magnetic fields. The role of electrical conductivity of the crystal is also taken into account.
KW  - Rotation
KW  -  Convection
KW  -  Segregation
KW  -  Magnetic field
KW  -  Lorentz force
KW  -  Floating-zone method

DO  - 10.3970/fdmp.2005.001.033