|
|||||
|
|
Fullerene local order in Na2CsC60 by23Na NMR |
|
| Authors: | P Matus H Alloul P M Singer V Brouet G Kriza S Garaj L Forró |
| Institution: | 1. Laboratoire de Physique des Solides, Université Paris-Sud, Paris, France 2. Research Institute for Solid State Physics and Optics, P.O.B. 49, 1525, Budapest, Hungary 3. Laboratoire de Nanostructures et Nouveaux Matriaux électroniques, Institut de Physique de la Matière Complexe, Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland |
| Abstract: | We have investigated the alkali metal fulleride Na2CsC60 by23Na nuclear magnetic resonance (NMR), The NMR line of the tetrahedral site is split below 170 K (T and T′ lines) similarly to the A3C60 compounds with A=Rb or K. The intensity fraction of the T′ line follows the same temperature dependence as the13C NMR line width. We have also found that the spectrum is independent of the cooling rate. Spin-echo double resonance measurements show that T and T′ sites are mingled on a microscopic scale. We propose that the different23Na NMR lines correspond to different fullerene orientational environments of the tetrahedral alkaline site. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |