11B nuclear magnetic resonance in boron-doped diamond |
| |
Authors: | Miwa Murakami Tadashi Shimizu Masataka Tansho Yoshihiko Takano |
| |
Affiliation: | 1.National Institute for Materials Science, 3-13 Sakura, Tsukuba, Ibaraki, 305-0003, Japan;2.International Center for Materials Nanoarchitectonics, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan |
| |
Abstract: | This review summarizes recent results obtained by 11B solid-state nuclear magnetic resonance (NMR) on boron-doped diamond, grown by the high-pressure high-temperature (HPHT) or chemical vapor deposition techniques. Simple single-pulse experiments as well as advanced two-dimensional NMR experiments were applied to the boron sites in diamond. It is shown that magic-angle spinning at magnetic fields above 10 T is suitable for observation of high-resolution 11B spectra of boron-doped diamond. For boron-doped HPHT diamonds, the existence of the excess boron that does not contribute to electrical conductivity was confirmed and its 11B NMR signal was characterized. The point-defect structures (B+H complexes and -B-B-/-B-C-B- clusters), postulated previously for the excess boron, were discarded and graphite-like structures were assigned instead. |
| |
Keywords: | boron-doped diamond 11B NMR two-dimensional NMR |
|
|