Superconducting properties in bulk nanostructured niobium prepared by high-pressure torsion

Terukazu Nishizaki, Seungwon Lee, Zenji Horita, Takahiko Sasaki, Norio Kobayashi

研究成果: Contribution to journalArticle

16 引用 (Scopus)

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We have measured the magnetization M(T, H) and the resistivity p(T) in bulk nanostructured Nb prepared by high-pressure torsion (HPT) and studied the effect of the grain refinement on the superconducting properties. With increasing revolution numbers N of HPT, the critical temperature Tc and the critical current density Jc increase. The enhancement of Tc is consistent with the size effect for nanoscale superconductors. The increase of Jc can be explained by the enhanced vortex pinning due to the introduction of lattice defects such as dislocations and grain boundaries.

元の言語英語
ページ(範囲)132-135
ページ数4
ジャーナルPhysica C: Superconductivity and its applications
493
DOI
出版物ステータス出版済み - 1 1 2013

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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