2024-03-28T17:04:53Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00028400
2023-01-16T04:21:12Z
320:321:322
In-Field Transport Properties at Grain Boundaries in BaHfO3-doped SmBa2Cu3Oy Bicrystal Films at Low Temperatures
Tsuchiya, Yuji
Akita, Junya
Ichino, Yusuke
Miura, Shun
Yoshida, Yutaka
open access
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Critical current
Grain boundaries
Coated conductors
Cuprates
High-temperature superconducting REBCO tapes are attractive for their high critical current density. Jc in the REBCO film is suppressed under magnetic fields and by grain boundaries. Our group has reported that artificial pinning centers (APC) enhance the Jc at the grain boundaries in the REBCO films at the liquid nitrogen temperature of 77 K. In this study, we have extended our previous work to a lower temperature since the usage of the REBCO tapes at a lower temperature and a high magnetic field is a recent development trend. Transport characteristics at grain boundaries in the REBCO films with and without APC are investigated at temperatures down to 4.2 K and at magnetic fields up to 9 T. The results show that the introduction of the APCs is effective to enhance the Jc at the grain boundaries at low temperatures and at the magnetic fields, especially around the matching field where the density of the APC is equal to that of vortices.
IEEE
2019-08
eng
journal article
AM
http://hdl.handle.net/2237/00030593
https://nagoya.repo.nii.ac.jp/records/28400
https://doi.org/10.1109/TASC.2019.2903469
1051-8223
IEEE Transactions on Applied Superconductivity
29
5
1
5
https://nagoya.repo.nii.ac.jp/record/28400/files/Final_Manuscript.pdf
application/pdf
669.9 kB
2019-08-09