Some features of single crystal growth from a crucible with skull

L. A. Gorbunov

Institute of Physics, University of Latvia, Salaspils-1, LV-2169,Latvia

Abstract
The paper considers a method for single crystal growth from a crucible with skull (a thin layer of the solidified melt, covering the crucible wall and bottom from inside). The skull prevents contamination of the melt with the material the crucible is made of. The method is based on the combined heating of the melt by a resistive heater and by an alternating magnetic field. The sharp decrease of the conductivity of semiconducting melts at crystallization allows to select an AC-field frequency, at which almost all heat losses take place in the liquid phase, and the skull is ``transparent'' for the alternating field. To decrease the melt stirring rate, a steady magnetic field is applied. Figs 6, Refs 5.