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APS » Journals » Phys. Rev. Lett. » Volume 95 » Issue 8
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Phys. Rev. Lett. 95, 087003 (2005) [4 pages]

Superconductivity of Bulk CaC6

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N. Emery1, C. Hérold1, M. d’Astuto2, V. Garcia3, Ch. Bellin2, J. F. Marêché1, P. Lagrange1, and G. Loupias2
1Laboratoire de Chimie du Solide Minéral—UMR 7555, Université Henri Poincaré Nancy I, B.P. 239, 54506 Vandœuvre-lès-Nancy Cedex, France
2Institut de Minéralogie et de Physique des Milieux Condensés, IMPCM-UMR 7590, Université Pierre et Marie Curie (Paris 6), case 115, 4 place Jussieu, F75252 Paris-Cedex 05, France
3Institut des Nano-Sciences de Paris, INSP-UMR 7588, Université Pierre et Marie Curie (Paris 6), 4 place Jussieu, 75252 Paris-Cedex 05, France

Received 3 June 2005; published 18 August 2005

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.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.087003
DOI:
10.1103/PhysRevLett.95.087003
PACS:
74.70.Ad, 81.05.Uw, 75.20.En
 
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