TY - JOUR
T1 - In-Field Transport Properties at Grain Boundaries in BaHfO3-doped SmBa2Cu3Oy Bicrystal Films at Low Temperatures
AU - Tsuchiya, Yuji
AU - Akita, Junya
AU - Ichino, Yusuke
AU - Miura, Shun
AU - Yoshida, Yutaka
N1 - Funding Information:
Manuscript received October 30, 2018; accepted March 1, 2019. Date of publication March 7, 2019; date of current version April 5, 2019. This work was supported in part by JST-ALCA, JSPS KAKENHI under Grants 15K14301, 15K14302, 15H04252, and 16K20898. (Corresponding author: Yuji Tsuchiya.) Y. Tsuchiya, J. Akita, Y. Ichino, and Y. Yoshida are with the Department of Electrical Engineering, Nagoya University, Aichi 464-8603, Japan (e-mail:, tsuchiya@nuee.nagoya-u.ac.jp). S. Miura is with the Institute of Superconductor Systems, Kyushu University, Fukuoka 819-0395, Japan. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org Digital Object Identifier 10.1109/TASC.2019.2903469
PY - 2019/8
Y1 - 2019/8
N2 - Higherature 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.
AB - Higherature 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.
UR - http://www.scopus.com/inward/record.url?scp=85064698544&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85064698544&partnerID=8YFLogxK
U2 - 10.1109/TASC.2019.2903469
DO - 10.1109/TASC.2019.2903469
M3 - Article
AN - SCOPUS:85064698544
SN - 1051-8223
VL - 29
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 5
M1 - 8662621
ER -