Upper Critical Field of the Anisotropic Organic Superconductors, (TMTSF)2CIO4

Authors:
  • KMKeizo Murata
    Keizo Murata
  • MTMadoka Tokumoto
    Madoka Tokumoto
  • HAHiroyuki Anzai
    Hiroyuki Anzai
  • KKKoji Kajimura
    Koji Kajimura
  • TITakehiko Isiiiguro
    Takehiko Isiiiguro
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Abstract
The anisotropy of the upper critical field, H C2, of the organic superconductor, (TMTSF)2CIO4 was determined. The principal axes of H C2 were associated with the axes of the lattice. From the temperature dependence of H C2, Pauli (Clogston) limited behavior was apparent when the magnetic field was parallel to the a-axis, which suggests the singlet superconductivity. Coherence lengths of two samples were calculated and found to be strongly dependent on T C.