Abstract
The authors report13C,87Rb,39K, and133Cs nuclear magnetic resonance (NMR) measurements of lineshapes, Knight shifts, and spin-lattice relaxation rates in the normal and superconducting states of M3C60, where M3 = Rb3, K3, Rb2K, RbK2, Rb2Cs, and RbCs2. Measurements are used as a guide to a new ammonia solvent synthesis technique. Temperature dependence of the superconducting state electron spin susceptibility is found to follow BCS weak coupling predictions. The issue of the Hebel-Slichter coherence peak is addressed.
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Stenger, V.A., Recchia, C., Pennington, C.H. et al. NMR studies of alkali C60 superconductors. J Supercond 7, 931–936 (1994). https://doi.org/10.1007/BF00732274
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DOI: https://doi.org/10.1007/BF00732274