J. Phys. IV France 114 (2004) 313
Shubnikov-de Haas oscillations and low temperature electronic structure in FeCl 3 and CoCl 2 graphite intercalation compoundsK. Enomoto1, 1, S. Yasuzuka1, T. Konoike1, M. Nishimura1, S. Uji1, T. Enoki2, M. Suzuki3 and I.S. Suzuki3
1 National Institute for Materials Science, 3-13, Sakura, Tsukuba, Ibaragi 305-0003, Japan
2 Department of Chemistry, Tokyo Institute for Technology, Ookayama, Meguro-ku, Tokyo 152-8551, Japan
3 Department of Physics, State University of New York at Binghamton, Binghamton, New York 13902-6016, USA
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 -electrons and localized 3d-magentic moments. Key words. Graphite intercalation compounds - transition metal chlorides - quantum oscillation.
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