Influence of columnar defects on pinning parameters in high-Tc superconductors

Masakazu Haruta, T. Fujiyoshi, T. Sueyoshi, K. Miyahara, T. Ikegami, K. Ebihara, R. Miyagawa, N. Ishikawa, Satoshi Awaji, Kazuo Watanabe

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


The influence of columnar defects introduced by the heavy-ion irradiation on the pinning parameters in YBa2Cu3O7-δ thin films was investigated. The pinning parameters n, Jcm and ΔJc were derived by fitting the experimentally obtained E-J characteristics to the theoretical curves calculated from the percolation transition model. The values of n and Jcm have been increased and the value of ΔJc has been decreased by the introduction of columnar defects.

Original languageEnglish
Pages (from-to)511-514
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue numberSPEC. ISS.
Publication statusPublished - 2004 Oct 1


  • Columnar defects
  • E-J characteristics
  • High-T superconductors
  • Pinning parameters

ASJC Scopus subject areas

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


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