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On the normal and superconducting properties of Ba6C60


From SQUID measurements we determine the basic critical magnetic field values for bcc phase Ba6C60 superconductor and hence evaluate the major parameters of superconductivity in this material. A comparative analyses of these parameters observed for the alkaline-earth-doped vs. alkali-metal-doped C60 superconductors is presented. These two systems are found to differ substantially in their superconducting properties: for Ba6C60 we find that the upper critical fieldH c 2≈2 T, and the Ginzburg-Landau parameterκ≈15, as compared to the values 50 T and 100, respectively, for superconducting K3C60. On the other hand, the electronic properties for all the superconducting fullerenes are rather similar with, for example, the Fermi energyE F∼0.1 eV.

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Korenivski, V., Rao, K.V. On the normal and superconducting properties of Ba6C60 . J Supercond 8, 67–70 (1995).

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Key words

  • Fullerenes
  • superconductivity
  • Ba6C60
  • critical magnetic fields
  • electronic properties