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Effects of Cd-doping on high-field low-temperature superconducting state in CeCoIn5

  • Author(s): Tokiwa, Y
  • Ronning, F
  • Thompson, JD
  • Movshovich, R
  • Pham, LD
  • Fisk, Z
  • et al.

We report specific heat of CeCo (In0.975 Cd0.025)5 in magnetic field along basal plane. The superconducting transition is not sharp first order-like in high fields and the specific heat at field 12 T displays a sharp peak anomaly at 0.14 K inside the superconducting state. The anomaly is larger and sharper than that for the proposed Fulde-Ferell-Larkin-Ovchinnikov state in pure CeCoIn5. © 2007.

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