Unconventional upper-and lower-critical fields and normal-state magnetic susceptibility of the superconducting compound Na0.35CoO2⋅1.3H2O

Hiroya Sakurai, Kazunori Takada, Shunsuke Yoshii, Takayoshi Sasaki, Koichi Kindo, Eiji Takayama-Muromachi

研究成果: Article査読

72 被引用数 (Scopus)

抄録

Magnetic properties of the layered superconductor, Na0.35CoO2⋅1.3H2O have been investigated. From the temperature dependence and field dependence of the magnetization, the superconducting transition temperature, as well as upper-and lower-critical fields have been estimated to be TC = 4.6 K, HC2(0)=61.0 T and HC1(0)=28.1 Oe, respectively. These values give quite unusual phenomenological parameters, i.e., coherent length, penetration depth and Ginzburg-Landau parameter of ξ=2.32 nm, λ=5.68×102 nm, and κ≡λ/ξ=244, respectively, suggesting an unconventional nature of superconductivity. Additionally, the magnetic susceptibility above TC and the magnetization curve up to 54 T are also reported.

本文言語English
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
68
13
DOI
出版ステータスPublished - 2003
外部発表はい

ASJC Scopus subject areas

  • 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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「Unconventional upper-and lower-critical fields and normal-state magnetic susceptibility of the superconducting compound Na<sub>0.35</sub>CoO<sub>2</sub>⋅1.3H<sub>2</sub>O」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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