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Magnetostriction of pristine graphite and SbCl5-graphite intercalation compounds

✍ Scribed by Y. Yosida; S. Tanuma

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
493 KB
Volume
23
Category
Article
ISSN
0008-6223

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✦ Synopsis

Magnetostrictive strain in pristine highly oriented pyrolytic graphite (HOPG) and SbCI,-graphite intercalation compounds (GIG's) has been studied in steady magnetic fields up to IO tesla, including the quantum oscillation effect. Fourier spectra of the magneto-oscillations are stage dependent and in agreement with those reported by Takahashi et a/. For pristine HOPG, the monotonic component of the longitudinal magnetostrictive strain (LMS) parallel to the c-axis is found to be negative and to increase in magnitude with increasing width at half maximum intensity of the (002) line of X-ray diffraction. This result is explained qualitatively within the framework of the Keyes theory by considering the reduction of the static shear modulus of graphite due to the displacement of basal-plane dislocations. The stress coefficient of the majority hole Fermi surface is determined as a In S,/I?U,,,, = 0.034 + 0.006 kbar-' by using magnetostriction and torque de Haas-van Alphen measurements.

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