Influence of Fluorination On the Transport-properties of Some Series of Materials
- Tressaud, A.
- Chevalier, B.
- Piraux, Luc
- Cassart, M.
DOIAbstract
The effect of fluorination on the transport properties of three classes of materials is presented. The intercalation of fluorine in graphitized carbon fibres drastically modifies their electrical behaviour. A wide range of conductivities is observed from sigma(300K) similar to 1.5 X 10(5) S cm(-1) for Csimilar to 14F to sigma(300K) similar to 10(2) S cm(-1) for C-<3F. A superconducting oxyfluoride La2Cu(O,C-F4.17 is obtained by the intercalation of fluorine species into the La2CuO4 lattice. Superconductivity can be attributed to a hole-doping process and the increase of the number of charge carriers is confirmed by the thermoelectric power results. In YBa2Cu3O7-delta ceramics, an enhancement of the critical current density results from a ra...
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