C-13 NMR INVESTIGATION OF CVD DIAMOND - CORRELATION OF NMR AND RAMAN SPECTRAL LINEWIDTHS

Six CVD diamond thin films were examined by magic angle spinning (MAS) C-13 nuclear magnetic resonance (NMR), Raman, and electron spin resonance spectroscopy. The use of film samples cut to the diameter of the magic-angle spinning rotor provided ease of spinning and the opportunity to obtain good signal-to-noise spectra in 4 to 16 h. MAS NMR linewidths exhibit a linear correlation with Raman linewidths and reflect the optical quality of the material. Residual MAS NMR linewidths most likely arise from a combination of crystal defect sites and paramagnetic effects.