Microwave losses of bulk CaC6

We report a study of the temperature dependence of the surface resistance RS in the graphite intercalated compound (GIC) CaC6, where superconductivity at 11.5K was recently discovered. Experiments are carried out using a copper dielectrically loaded cavity operating at 7GHz in a “hot finger” configu...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Physica. C, Superconductivity Superconductivity, 2007-09, Vol.460-462 (1), p.716-717
Hauptverfasser:	Cifariello, G., Di Gennaro, E., Lamura, G., Andreone, A., Emery, N., Hérold, C., Marêché, J.F., Lagrange, P.
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Graphite intercalated compound Metals, alloys and compounds (a15, 001c15, laves phases, chevrel phases, borocarbides, etc.) Pairing symmetry Physics Properties of type I and type II superconductors Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.) Superconducting materials (excluding high-tc compounds) Superconductivity Surface resistance
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	We report a study of the temperature dependence of the surface resistance RS in the graphite intercalated compound (GIC) CaC6, where superconductivity at 11.5K was recently discovered. Experiments are carried out using a copper dielectrically loaded cavity operating at 7GHz in a “hot finger” configuration. Bulk CaC6 samples have been synthesized from highly oriented pyrolytic graphite. Microwave data allow to extract unique information on the quasiparticle density and on the nature of pairing in superconductors. The analysis of RS(T) confirms our recent experimental findings that CaC6 behaves as a weakly-coupled, fully gapped, superconductor.
ISSN:	0921-4534 1873-2143
DOI:	10.1016/j.physc.2007.03.426