Superconductivity of CeRhIn<sub>5</sub> under High Pressure

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  • Muramatsu Takaki
    Research Center for Materials Science under Extreme Conditions, Osaka University, Toyonaka, Osaka 560-8531
  • Tateiwa Naoyuki
    Graduate School of Engineering Science, Osaka university, Toyonaka, Osaka 560-8531
  • Kobayashi Tatsuo C.
    Research Center for Materials Science under Extreme Conditions, Osaka University, Toyonaka, Osaka 560-8531
  • Shimizu Katsuya
    Graduate School of Engineering Science, Osaka university, Toyonaka, Osaka 560-8531
  • Amaya Kiichi
    Graduate School of Engineering Science, Osaka university, Toyonaka, Osaka 560-8531
  • Aoki Dai
    Graduate School of Science, Osaka University, Toyonaka, Osaka 560-8531
  • Shishido Hiroaki
    Graduate School of Science, Osaka University, Toyonaka, Osaka 560-8531
  • Haga Yoshinori
    Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195
  • Onuki Yoshichika
    Graduate School of Science, Osaka University, Toyonaka, Osaka 560-8531 Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195

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  • Superconductivity of CeRhIn5 under High Pressure.

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The pressure dependence of transport properties in CeRhIn5 was studied up to 8.5 GPa by using a diamond-anvil cell. The electrical resistivity does not follow the T2-dependecne of a Fermi liquid nature under any pressure. In this non-Fermi liquid state, superconductivity was observed in a wide pressure range of 1.5 GPa<P<7.6 GPa. The superconducting temperature TC has a double-maximum structure with a minimum at 5.2 GPa. A maximum of TC=2.2 K was observed at P=2.5 GPa, where the corresponding electrical resistivity just above TC has the maximum. The upper critical field HC2 and the magnetoresistances were also investigated under pressure.

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