Superconductivity of bulk CaC6.
We have obtained bulk samples of the graphite intercalation compound, CaC6, by a novel method of synthesis from highly oriented pyrolytic graphite. The crystal structure has been completely determined showing that it is the only member of the MC6, metal-graphite compounds that has rhombohedral symmetry. We have clearly shown the occurrence of superconductivity in the bulk sample at 11.5 K, using magnetization measurements.
Emery
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N
Laboratoire de Chimie du Solide Minéral-UMR 7555, Université Henri Poincaré Nancy I, B.P. 239, 54506 Vandoeuvre-lès-Nancy Cedex, France.
Hérold
C
C
d'Astuto
M
M
Garcia
V
V
Bellin
Ch
Ch
Marêché
J F
JF
Lagrange
P
P
Loupias
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G