| 저자(한글) |
Assouik, J.,Hajji, L.,Boukir, A.,Herold, C.,Lagrange, P. |
| 초록 |
Intercalation reaction occurs when an excess of a liquid heavy alkali metal-arsenic alloy is contacted with a graphite sample under vacuum. This leads to the formation of several novel ternary phases. X-ray structural analysis was conducted to determine how intercalated metallic alloy is arranged between the graphitic layers. The results have shown that these phases are composed of poly6layered sheets alternately stacked with carbon layers along the c-axis. In addition, these layers are perfectly ordered with respect to the adjacent carbon planes. Two-dimensional super-lattices have been recorded and analyzed. The electrical conductivity has been studied both parallel and perpendicular to the basal planes, between 4.2 and 295K. The basal-plane behavior is metallic, but the c-axis resistivity displays very high resistivity. The room temperature anisotropy is of the order of 10 4 , which increases for some phases, by more than one order of magnitude at 4.2K. |
