Flux Pinning by Columnar Defects along a-axis in a-axis Oriented YBCO Thin Films

Tetsuro Sueyoshi, Yasuya Iwanaga, Takanori Fujiyoshi, Yosuke Takai, Mitsuhiro Muta, Masashi Mukaida, Ataru Ichinose, Norito Ishikawa

Research output: Contribution to journalArticle

Abstract

Columnar defects (CDs) along a-axis were installed into an in-plane aligned a-axis-oriented YBa2Cu3Oy film by using heavy-ion irradiation, in order to clarify the influence of CDs on flux pinning properties around B // ab. The critical current density Jc at B // c significantly decreases after the irradiation, since the CDs act as a channel for flux creep along their length. The magnetic field dependence of Jc at B // ab, on the other hand, is weakened by the introduction of CDs. This means that the CDs can trap flux lines at B // ab, whereas naturally growth defects working as effective ab-correlated PCs exist. The trapping angle of CDs along the a-axis is extremely narrow (∼5.8°) in comparison with CDs along the c-axis and is roughly coincides with other ab-correlated PCs. The small trapping angle of CDs along the a-axis is attributed to strong line tension energy of flux lines with elliptical core around B // ab.

Original languageEnglish
Article number8636249
JournalIEEE Transactions on Applied Superconductivity
Volume29
Issue number5
DOIs
Publication statusPublished - Aug 1 2019

Fingerprint

Flux pinning
flux pinning
Thin films
Defects
defects
thin films
Fluxes
trapping
Heavy Ions
Ion bombardment
ion irradiation
Heavy ions
critical current
heavy ions
Creep
traps
Irradiation
Magnetic fields
current density
irradiation

All Science Journal Classification (ASJC) codes

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

Cite this

Flux Pinning by Columnar Defects along a-axis in a-axis Oriented YBCO Thin Films. / Sueyoshi, Tetsuro; Iwanaga, Yasuya; Fujiyoshi, Takanori; Takai, Yosuke; Muta, Mitsuhiro; Mukaida, Masashi; Ichinose, Ataru; Ishikawa, Norito.

In: IEEE Transactions on Applied Superconductivity, Vol. 29, No. 5, 8636249, 01.08.2019.

Research output: Contribution to journalArticle

Sueyoshi, T, Iwanaga, Y, Fujiyoshi, T, Takai, Y, Muta, M, Mukaida, M, Ichinose, A & Ishikawa, N 2019, 'Flux Pinning by Columnar Defects along a-axis in a-axis Oriented YBCO Thin Films', IEEE Transactions on Applied Superconductivity, vol. 29, no. 5, 8636249. https://doi.org/10.1109/TASC.2019.2896473
Sueyoshi, Tetsuro ; Iwanaga, Yasuya ; Fujiyoshi, Takanori ; Takai, Yosuke ; Muta, Mitsuhiro ; Mukaida, Masashi ; Ichinose, Ataru ; Ishikawa, Norito. / Flux Pinning by Columnar Defects along a-axis in a-axis Oriented YBCO Thin Films. In: IEEE Transactions on Applied Superconductivity. 2019 ; Vol. 29, No. 5.
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