Anisotropy of upper critical field and surface superconducting state in the intermediate-valence superconductor CeIr3

Yoshiki J. Sato, Fuminori Honda, Yusei Shimizu, Ai Nakamura, Yoshiya Homma, Arvind Maurya, Dexin Li, Takatsugu Koizumi, Dai Aoki

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

CeIr3 is a Ce-based superconductor with a superconducting transition temperature Tc=3.4 K in an intermediate-valence state. We grew high-quality single crystals of CeIr3 using the Czochralski method, and measured the electrical resistivity, magnetic torque, and specific heat. The anisotropy of the superconducting upper critical field Hc2 was determined. The temperature dependence of Hc2, obtained from the resistivity measurements, suggests the multiband character of the superconductivity in CeIr3. Different field-angle dependencies of Hc2 in electrical transport and thermodynamic measurements indicate the robust surface effect in the bulk superconductivity of CeIr3. We analyzed the surface superconductivity based on simple models to reveal the bulk superconducting properties. Our results support the isotropic bulk superconducting state and robust surface superconductivity in CeIr3 single crystals.

本文言語英語
論文番号174503
ジャーナルPhysical Review B
102
17
DOI
出版ステータス出版済み - 11 10 2020
外部発表はい

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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