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 language | English |
|---|---|
| Article number | 8636249 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 29 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - Aug 1 2019 |
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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 journal › Article
}
TY - JOUR
T1 - Flux Pinning by Columnar Defects along a-axis in a-axis Oriented YBCO Thin Films
AU - Sueyoshi, Tetsuro
AU - Iwanaga, Yasuya
AU - Fujiyoshi, Takanori
AU - Takai, Yosuke
AU - Muta, Mitsuhiro
AU - Mukaida, Masashi
AU - Ichinose, Ataru
AU - Ishikawa, Norito
PY - 2019/8/1
Y1 - 2019/8/1
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=85066609251&partnerID=8YFLogxK
U2 - 10.1109/TASC.2019.2896473
DO - 10.1109/TASC.2019.2896473
M3 - Article
AN - SCOPUS:85066609251
VL - 29
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 5
M1 - 8636249
ER -