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Transmission electron microscopy study of Ge implanted into SiC

Published online by Cambridge University Press:  31 January 2011

T. Gorelik
Affiliation:
Physikalisch-Astronomische Fakultät, Universität Jena, D-07743 Jena, Germany
U. Kaiser
Affiliation:
Physikalisch-Astronomische Fakultät, Universität Jena, D-07743 Jena, Germany
Ch. Schubert
Affiliation:
Physikalisch-Astronomische Fakultät, Universität Jena, D-07743 Jena, Germany
W. Wesch
Affiliation:
Physikalisch-Astronomische Fakultät, Universität Jena, D-07743 Jena, Germany
U. Glatzel*
Affiliation:
Physikalisch-Astronomische Fakultät, Universität Jena, D-07743 Jena, Germany
*
a) Address all correspondence to this author. e-mail: uwe.glatzel@uni-jena.de
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Abstract

Hexagonal 6H– and 4H–SiC wafers were implanted with (1−1.5) × 1016 cm−2 germanium ions at room temperature and at 700 °C with subsequent annealing between 1000 and 1600 °C. Structural changes in the SiC matrix were studied in detail by means of transmission electron microscopy (TEM). After implantation at room temperature the hexagonal SiC matrix becomes amorphous and, after annealing, recrystallizes into cubic SiC. The latter process was accompanied by the creation of voids and cracks. In case of high-temperature (700 °C) implantation, where amorphization was avoided, no polytype change in as-implanted and annealed SiC wafers was observed. In annealed samples nanocrystalline precipitates with high Ge content were observed in high-resolution TEM images.

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Articles
Copyright
Copyright © Materials Research Society 2002

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