Strong flux pinning by columnar defects with directionally dependent morphologies in GdBCO-coated conductors irradiated with 80 MeV Xe ions

Tetsuro Sueyoshi, Tetsuya Kotaki, Yuichi Furuki, Takanori Fujiyoshi, Satoshi Semboshi, Toshinori Ozaki, Hitoshi Sakane, Masaki Kudo, Kazuhiro Yasuda, Norito Ishikawa

Research output: Contribution to journalArticle

Abstract

We show that Xe ion irradiation with 80 MeV to GdBa2Cu3Oy-coated conductors creates different morphologies of columnar defects (CDs) depending on the irradiation angles θ i relative to the c-axis: continuous CDs with a larger diameter are formed for oblique irradiation at θ i = 45°, whereas the same ion beam at a different angle (θ i = 0°) induces the formation of discontinuous CDs. The direction-dependent morphologies of CDs significantly affect the angular behavior of the critical current density J c. In particular, low-energy irradiation defects induce further improvement of J c in a unique combination of irradiation angles of θ i = 0° and ±45°: discontinuous CDs at θ i = 0° and crossed CDs at θ i = ±45° provide correlated pinning in a wide angular range, which is more strongly enhanced by each other via the pinning of kinks.

Original languageEnglish
Article number023001
JournalJapanese journal of applied physics
Volume59
Issue number2
DOIs
Publication statusPublished - 2020

ASJC Scopus subject areas

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

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