W. Kempinski et J. Stankowski, 2 SUPERCONDUCTING PHASES RELATED TO DIFFERENT STOICHIOMETRY OF K-DOPED C-60, Solid state communications, 97(12), 1996, pp. 1079-1083
The evolution of superconductivity related to a different v value of C
-60(v-) radicals was examined by means of the MMMA method. Two differe
nt and well separated onset T-c temperatures were found: T-c((1)) = (2
1 +/- 0.5)K related to the presence of C-60(1-) EPR signal and T-c((2)
) = (18 +/- 0.5) K related to C-60(3-) in EPR spectrum.