1. Hexagonal diamond synthesis on h-GaN strained films
- Author
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Abha Misra, Brajesh S. Yadav, Padmnabh Rai, Vivek Pancholi, D. S. Misra, Indradev Samajdar, and Pawan Tyagi
- Subjects
X-Ray-Diffraction ,Materials science ,Phase-Transformation ,Physics and Astronomy (miscellaneous) ,Raman-Spectroscopy ,Material properties of diamond ,Wide-bandgap semiconductor ,Hexagonal phase ,Analytical chemistry ,Temperature ,chemistry.chemical_element ,Diamond ,Chemical vapor deposition ,engineering.material ,Stress ,Carbon ,symbols.namesake ,chemistry ,Phase (matter) ,symbols ,engineering ,Graphite ,Gallium ,Raman spectroscopy - Abstract
Chemical vapor deposited diamond films grown on strained gallium nitride-coated quartz substrate are found to display a dominantly hexagonal diamond phase. The phase identification is done using Raman spectroscopy and orientation imaging microscopy (OIM). The presence of a 1324.4 cm(-1) band in the Raman spectra is attributed to a hexagonal diamond symmetry, but the unambiguous signature of the hexagonal phase is confirmed by OIM. A phase map of the sample clearly shows that 88% of the scanned sample area is hexagonal diamond. (c) 2006
- Published
- 2006