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Laser induced fractal crystallites in amorphous Te–Se–Br films

Published online by Cambridge University Press:  31 January 2011

T. Carrière ,
C. Ortiz  and
G. Fuchs
T. Carrière
Affiliation:
IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120–6099
C. Ortiz
Affiliation:
IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120–6099
G. Fuchs
Affiliation:
IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120–6099
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Abstract

This work presents the first experimental evidence of the formation of a fractal network of crystalline clusters in the first stage of the amorphous-crystal transformation. Although this transformation has been extensively studied, such an intermediate stage between amorphous and crystalline phases has never been experimentally revealed before. This fractal network was obtained by laser irradiation of an amorphous Te–Se–Br alloy. The irradiation conditions have been determined in order to be in a regime of limited diffusion, which is the basis of fractal formation. Moreover, the fractal dimension has been determined to be 1.55, which corresponds to the theoretical value obtained for fractal growth by a process of cluster-cluster aggregation with some structural readjustment.

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 8 , August 1991 , pp. 1680 - 1684
Copyright
Copyright © Materials Research Society 1991

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