Effect of c-axis-correlated disorders on the vortex diagram of the pinning state

Masafumi Namba, Satoshi Awaji, Kazuo Watanabe, Tsutomu Nojima, Satoru Okayasu, Masashi Miura, Yusuke Ichino, Yutaka Yoshida, Yoshiaki Takai, Tomoya Horide, Paolo Mele, Kaname Matsumoto

Research output: Contribution to journalArticlepeer-review

Abstract

The introduction of the c-axis-correlated disorder is a promising technique for the improvement of the critical current density Jc for B // c of REBa2Cu3Oy, (RE123) films and tapes. In order to understand the vortex pinning mechanism with the different variety of the c-axis-correlated disorder, the angular dependence of Jc was measured in detail for an Y123 film with BaZrO3 nano-rods, a Sm123 film with fine nano-particles and edge dislocations and an Y123 film with columnar defects introduced by the heavy-ion irradiation parallel to the c-axis. We found that the vortex pinning state for the variety of the c-axis-correlated pinning is similar in low fields below the matching field, but it shows different behaviors in high fields above the matching field. It is considered that the interstitial vortices interacted with the c-axis-correlated disorders through the vortex interaction may play an important role for the appearance of the c-axis-correlated pinning behavior in a high-field region above the matching field.

Original languageEnglish
Pages (from-to)317031-317033
Number of pages3
JournalApplied Physics Express
Volume1
Issue number3
DOIs
Publication statusPublished - 2008 Mar 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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