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Growth of II-VI Solid Solutions in the Presence of a Rotating Magnetic FieldThe application of a rotating magnetic field (RMF)in the frequency range 60-400 Hz and field strength of the order of 2-8 mT to crystal growth has received increasing attention in recent years. To take full advantage of the control of fluid flow by the forces applied by the field, the liquid column must be electrically conducting. Also, the application of RMF to the directional solidification of a column of liquid can result in complete mixing in the resultant solid. Thus, the technique of RMF is suited to solvent zones and float zones where the composition of the liquid is more readily controlled. In the work we report on, numerical modeling has been applied to II-VI systems, particularly tellurium based traveling heater techniques (THM). Results for a spectrum of field strengths and acceleration levels will be presented. These show clearly the effects of competing buoyancy forces and electromagnetic stirring. Crystals of cadmium zinc telluride and mercury cadmium telluride have been grown terrestrially from a tellurium solvent zone. The effects of the RMF during these experiments will be demonstrated with micrographs showing etch pits, white beam x-ray synchrotron topographs and triple axis x-ray diffraction.
Document ID
19990094173
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Gillies, D. C
(NASA Marshall Space Flight Center Huntsville, AL United States)
Motakef, S.
(Cape Simulations, Inc. Newton, MA United States)
Dudley, M.
(State Univ. of New York Stony Brook, NY United States)
Matyi, R.
(Wisconsin Univ. Madison, WI United States)
Volz, H.
(Wisconsin Univ. Madison, WI United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Subject Category
Solid-State Physics
Distribution Limits
Public
Copyright
Other

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