Surprises in the NMR of Silicon: Achieving High Resolution with Single Crystals
Abstract
Recent NMR measurements in a dilute dipolar solid (Si29 powders) show the appearance of an unexpected long tail and even-odd asymmetry in mulitple pulse experiments [A.E. Dementyev, D. Li, K. MacLean, S.E. Barrett, Phys. Rev. B 68, 153302 (2003).]. In order to probe the causes of these anomalies, similar NMR experiments on precisely cut, small single crystals were conducted. By varying the crystal size and orientation, the bulk susceptibility line broadening was greatly lowered, thus narrowing the spectral peak. The Silicon NMR puzzle remains, even in single crystals with extremely narrow lines.
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- March 2004
- Bibcode:
- 2004APS..MARY36010R