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The effect of temperature gradient and ampoule velocity on the composition and other properties of Bridgman-grown indium antimonide

Venkataraghavan, R and Rao, KSRK and Bhat, HL (1998) The effect of temperature gradient and ampoule velocity on the composition and other properties of Bridgman-grown indium antimonide. In: Journal of Crystal Growth, 186 (3). pp. 322-328.

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Official URL: http://dx.doi.org/10.1016/S0022-0248(97)00514-9

Abstract

A systematic study of the role of the melt–solid interface position in determining the crystal quality of Bridgman-grown indium antimonide ingots is made. The crystals are grown under various conditions of imposed gradients and velocities. The gradient-to-velocity ratio $\wedge$ in the crystal is seen to move the interface position above or below the melting-point isotherm and this in turn affects crystal quality and grain structure. Post-growth investigations reveal that the growth takes place under off-stoichiometric conditions, for large as well as for small values of $\wedge$, undesirable for growth of high-quality homogeneous ingots of InSb. However, crystals grown under ‘near-equilibrium’ conditions are stoichiometric, show low defect density, improved grain structure and comparatively narrow rocking-curve width, with very high mobility.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: InSb;Bridgman method;Interface;Off-stoichiometry
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 27 Nov 2006
Last Modified: 03 May 2011 07:01
URI: http://eprints.iisc.ernet.in/id/eprint/8983

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