Abstract
Shubnikov-de Haas (SdH) oscillations in the stage-1 FeCl 3 and CoCl 2 graphite intercalation compounds (GIC's) were measured in a wide temperature and magnetic field regions. There are two dominant SdH oscillations with values of 75 and 300 T in FeCl 3 GIC, and of 48 and 360 T in CoCl 2 GIC, respectively, with the magnetic field parallel to the c-axis. In both compounds, the SdH oscillations are observable only in a very limited field angle region, suggesting that the interlayer transport is incoherent. The overall feature of the angular-dependent magnetoresistance can not be interpreted by the semi-classical picture based on the Boltzman transport theory. These results can be ascribed to the strong magnetic scattering between the conduction π-electrons and localized 3d-magentic moments.
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