Suppression of Marangoni convection in the FZ silicon melt by high frequency magnetic field

• Published in: Nihon Kikai Gakkai rombunshuu. B hen Vol. 68; no. 667; pp. 203 - 209
• Main Authors: Munakata, Tetsuo, Someya, Satoshi, Tanasawa, Ichiro
• Format: Journal Article
• Language: Japanese
• Published: 01.03.2002
• ISSN: 0387-5016

The effect of a high frequency magnetic field on the Marangoni convection in the floating zone (FZ) silicon melt has been investigated numerically. The purpose of the study is to clarify the applicability of the high frequency magnetic field on the suppression of the Marangoni convection in the FZ silicon melt for space experiments. The numerically obtained results reveal that the high frequency magnetic field has a damping effect for the Marangoni convection, and is useful in controlling melt convection in the space environment. Further, the higher magnetic field frequency is useful in suppressing the Marangoni convection due to the skin effect. The impurity distribution in the crystal is also affected by the high frequency magnetic field, and the impurity distribution with respect to the radial direction becomes rather flat at the mostly suppressed Marangoni convection condition. (Author)