Magnetothermopower of single wall carbon nanotube newtwork

We have measured the electrical resistivity and thermoelectric power (TEP) of single wall carbon nanotube (SWCN) network. The resistivity result can b e fitted to the variable range hopping (VRH) type conduction formula. The r oom temperature TEP is about 30 similar to 60 mu V/K and the overall temper ature dependence of the TEP is similar to that of the disordered alloy whic h shows the electron-phonon enhancement of TEP. By applying the magnetic fi eld up to 6 Tesla, the magnitude of the TEP is reduced by similar to 2 mu V /K while the overall temperature dependence is more or less the same. The r esults are discussed by the heterogeneous model which was adapted to the co nducting polymers.