InP Crystal Growth by the THM on-board Russian FOTON-11 Retrievable Satellite: Theory and Experiment

摘要

THM experiments on InP crystal growth from indium solution (SKAT-FD) were performed during Russian FOTON-11 mission in October 1997. The aim of these experiments was to ascertain the effectiveness of controlling heat and mass transfer in the liquid phase by means of applying a rotating magnetic field (RMF). As an effort to understand the parameters influencing the crystal growth process the mathematical model was developed for a numerical simulation of these experiments. The SKAT-FD crystals were grown within the RMF at the induction of 1 and 2 mT. As the calculations show, such magnetic fields influences remarkably the hydrodynamics of the melt, and consequently, the growth process. The change of the magnetic induction value (or switching off the RMF) leads to abrupt change of the growth rate. It was measured from artificial dopant striations which were produced in the growing crystals by applying the heat pulse technique. From calculations the influence of the RMF on the S-distribution along the crystal axis is discussed as well.