Angular Behavior of Jc in GdBCO-Coated Conductors with Crossed Columnar Defects Around ab Plane

Tetsuro Sueyoshi, Yasuya Iwanaga, Takanori Fujioyoshi, Yohsuke Takai, Masashi Mukaida, Masaki Kudo, Kazuhiro Yasuda, Norito Ishikawa

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We investigated in detail the flux pinning properties around B || ab for GdBCO-coated conductors with crossed columnar defects produced by heavy-ion irradiation, where the crossing angle Θi was systematically controlled in the range from ±5° to ±15° relative to the ab plane. A single peak of critical current density Jc centered at B || ab occurs for the crossing angle of Θ i = ±5°, where an upward shift in Jc can be observed compared to an unirradiated sample. As the crossing angle is larger, the Jc peak becomes smaller and broader while maintaining the peak at B || ab. Increasing Θi up to ±15°, three Jc peaks emerges at B || ab and at the two irradiation angles, independently from the others. The crossover behavior from the single peak to the triple one around the ab plane is attributed to the strong line tension energy of flux lines around B || ab , which derives from the elliptical nature of the core of flux lines in anisotropic superconductors.

Original languageEnglish
Article number7778174
JournalIEEE Transactions on Applied Superconductivity
Volume27
Issue number4
DOIs
Publication statusPublished - Jun 2017

All Science Journal Classification (ASJC) codes

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

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