Temperature dependence of the electrical resistivities inAlCl3-graphite intercalation compounds determined by conduction-carrier spin resonance

We show that the temperature dependence of the in-plane and c-axis resistivities between 100 and 300 K for the acceptor ${\mathrm{AlCl}}_3$-graphite intercalation compounds can be obtained from the analysis of the intensity and line shape of the resonance in a conduction-carrier spin-resonance experiment. The results suggest a metallic and thermally activated hopping–like character for the in-plane and c-axis charge transport, respectively. The analysis of the resonance for pure graphite gives, within the experimental accuracy, the expected temperature dependence for the in-plane and c-axis resistivities, and an almost-temperature-independent Pauli paramagnetic susceptibility. The temperature dependence of the linewidth is attributed to the temperature dependence of both the carrier’s mobility and the ratio between the transition probability for spin flip due to spin-orbit coupling and the Coulomb scattering. For stage-1 and -7 the resonance parameters reveal a phase transition at 210 and 168 K, respectively.