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The influence of temperature gradient and lowering speed on the melt-solid interface shape of GaxIn1-xSb alloy crystals grown by vertical Bridgman technique

Udayashankar, NK and Naik, Gopalakrishna K and Bhat, HL (1999) The influence of temperature gradient and lowering speed on the melt-solid interface shape of GaxIn1-xSb alloy crystals grown by vertical Bridgman technique. In: Journal of Crystal Growth, 203 (3). pp. 333-339.

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Official URL: http://dx.doi.org/10.1016/S0022-0248(99)00109-8

Abstract

Radially homogeneous bulk alloys of GaxIn1-xSb in the range 0.7 < x < 0.8, have been grown by vertical Bridgman technique. The factors affecting the interface shape during the growth were optimised to achieve zero convexity. From a series of experiments, a critical ratio of the temperature gradient (G) of the furnace at the melting point of the melt composition to the ampoule lowering speed (v) was deduced for attaining the planarity of the melt-solid interface. The studies carried out on directional solidification of Ga0.77In0.23Sb mixed crystals employing planar melt-solid interface exhibited superior quality than those with nonplanar interfaces. The solutions to certain problems encountered during the synthesis and growth of the compound were discussed. (C) 1999 Elsevier Science B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Melt}solid interface;Convexity;Ampoule lowering rate; Structural quality
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 02 Jul 2011 05:32
Last Modified: 02 Jul 2011 05:32
URI: http://eprints.iisc.ernet.in/id/eprint/38852

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