Jm. Louis et al., SUPERCONDUCTING PROPERTIES OF K3C60 AND RB3C60 SINGLE-CRYSTALS IN HIGH FIELDS, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 244, 1994, pp. 333-337
The critical superconducting temperature of Rb3C60 and K3C60 single cr
ystals was measured in static magnetic fields up to 23 T by a resistiv
e method. It is shown that within the experimental accuracy no enhance
ment of the critical field H-C2 is found at low temperature. The H-C2(
T) follows the Werthamer, Helfand and Hohenberg theory quite well.