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Impurity diffusion in bismuth single-crystals

Misra, NK and Venkatasubramanian, VS (1979) Impurity diffusion in bismuth single-crystals. In: Indian Journal of Physics A and Proceedings of the Indian Association for the Cultivation of Science A, 53 (1-2). pp. 100-102.

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Official URL: http://journal.library.iisc.ernet.in/archives.html

Abstract

Measurements of impurity diffusion of 86Rb, 90Sr, 133Ba, and 137Cs in single crystal Bi were carried out. Diffusion samples were prepared from single crystal Bi by ion implantation. About 1012-1013 ions were implanted, resulting in surface activities approx =104 cpm. After implantation, specimens were annealed for specified times at 220-265 deg C, and tracer penetration profiles were determined by an electrolytic method. A typical penetration profile for 137Cs in Bi showed a linear relationship for log C vs x in with Fick's law for volume diffusion. Laws of grain boundary diffusion were not obeyed and the order of magnitude of the penetration distances was much less than on a grain boundary mechanism. Results were interpreted in terms of a modified Fischer analysis using a kinetic trapping term. Effective half lengths for trapping at a twin boundary were determined for each impurity.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Indian Assn Cultivation Sci.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 15 Dec 2010 10:43
Last Modified: 15 Dec 2010 10:43
URI: http://eprints.iisc.ernet.in/id/eprint/34387

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