Combined effects of crucible rotation and horizontal magnetic field on dopant concentration in a Czochralski melt

Three-dimensional numerical computations were carried out for the melt in a Czochralski system under a lateral magnetic field at Gr = 107, Pr = 0.01, Rerod = 1620, Recru = 0 or -3240, Ha = 0−1000 and Sc = 10. The fully three-dimensional velocity components, temperature and concentration profiles were obtained. The rotation of a crucible was found to decrease extensively the heat transfer rate and the concentration of dopant both in the melt and at the phase-change interface. Further application of strong magnetic field was found to increase the dopant concentration slightly due to the additional friction with the rotating crucible.