A microstructural study of superconductive nanocrystalline diamond

Villar, M. P., Alegre, Ma. P., Araujo, D., Bustarret, E., Achatz, P., Saminadayar, L., Bauerle, C. and Williams, Oliver Aneurin ORCID: https://orcid.org/0000-0002-7210-3004 2009. A microstructural study of superconductive nanocrystalline diamond. Physica Status Solidi a Applications and Materials Science 206 (9) , pp. 1986-1990. 10.1002/pssa.200982224

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Abstract

A transmission electron microscopy (TEM) study of superconducting nanocrystalline diamond (NCD) continuous layers is reported. The high resolution transmission electron microscopy (HREM) and the diffraction contrast modes of observations are used to reveal the nanograins configuration. Three types of them are observed: first, close to the interface with the Si/SiO2 substrate, 10–20 nm-sized diamond seeds resulting from the 5 nm size diamond powder deposition before growth that show some regrowth during CVD process, second a diamond overgrown layer, quasi-epitaxially by coalesced larger NCD grains, and finally, up to the free surface, a thin disordered region composed of nanocrystallites smaller than 6 nm. This last layer was not nominally expected and is attributed to a renucleated-like (RND) carbon layer embedding ultra NCD grains. Diffraction contrast observations confirm this HREM observed behavior.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	Wiley
ISSN:	1862-6300
Last Modified:	19 Oct 2022 08:31
URI:	https://orca.cardiff.ac.uk/id/eprint/18064

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