M. Kraus et al., SUPERCONDUCTING INTERCALATED FULLERENES - PREPARATION ROUTES AND PROPERTIES, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 244, 1994, pp. 339-344
Superconducting C-60 powder samples are investigated by means of dc ma
gnetization and X-ray diffraction. We discuss effects on the supercond
ucting behaviour arising from different sample preparation and grain s
izes. We derive then the temperature dependence of the magnetic penetr
ation depth which agrees best with theoretical expressions for weak-co
upled BCS-type superconductors in the clean limit.