Nernst effect in high-Tc cuprate superconductors

K. Yamafuji, T. Fujiyoshi, T. Kiss, M. Inoue, T. Sasaki, N. Kobayashi

研究成果: Article査読

1 被引用数 (Scopus)


Detailed measurements of both the Nernst coefficient, Ne, and the current vs. voltage characteristics were carried out in a YBCO film by varying systematically the flux density, B, and the temperature, T. The Nernst coefficient was observed over the temperature region of a fairly wide superconducting vs. normal resistive transition under the applied flux density, B. The transport entropy of a fluxoid, Sφ estimated directly from the present measurements showed a small tail decreasing exponentially with increasing temperature, even above the mean-field critical temperature, Tc(B), whereas the existing theory predicted Sφ to become zero above Tc(B). Then the expression for Sφ above Tc(B) was derived. The expression for the resistivity around the temperatures of the resistive transition was also derived, including the resistivity due to the flux flow. With the aid of these expressions, the observed Nernst coefficient was explained quantitatively by the present theory.

ジャーナルPhysica C: Superconductivity and its applications
出版ステータスPublished - 1999 12月 15

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
  • エネルギー工学および電力技術
  • 電子工学および電気工学


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