J. Phys. IV France 114 (2004) 313
DOI: 10.1051/jp4:2004114068

Shubnikov-de Haas oscillations and low temperature electronic structure in FeCl ₃ and CoCl ₂ graphite intercalation compounds

K. Enomoto^{1, 1}, S. Yasuzuka¹, T. Konoike¹, M. Nishimura¹, S. Uji¹, T. Enoki², M. Suzuki³ and I.S. Suzuki<sup>3

1</sup>  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

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 -electrons and localized 3d-magentic moments. Key words. Graphite intercalation compounds - transition metal chlorides - quantum oscillation.

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