Abstract
The c-axis sound velocities and attenuations for HOPG, stage 3 and stage 4 SbCl5-graphite were determined by ultrasonic techniques in the temperature range between 4 and 325 °K. The temperature variation of C33 for HOPG agrees closely with the theoretical prediction based on the Lennard-Jones interlayer potential. In SbCl5-graphite, the longitudinal sound attenuation increases sharply and the transverse sound cannot propagate for temperatures above 200 °K, indicating a commensurate-to-incommensurate in-plane phase transition. The stage dependence of C33 at low temperatures indicates that the interlayer forces beyond the nearest layers can not be neglected.
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Hwang, D.M. Ultrasonic Velocity Studies of Graphite and Its Intercalation Compounds. MRS Online Proceedings Library 20, 295 (1982). https://doi.org/10.1557/PROC-20-295
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DOI: https://doi.org/10.1557/PROC-20-295