TY - JOUR
T1 - Enhancement of In-Field Critical Current Density of BaZrO3-Added (Y, Gd) BCO-Coated Conductors by Using a Multi-Coating TFA-MOD Method
AU - Suzuki, Takumi
AU - Oomura, Syunsuke
AU - Imamura, Kazutaka
AU - Inoue, Masayoshi
AU - Higashikawa, Kohei
AU - Awaji, Satoshi
AU - Nakaoka, Koichi
AU - Izumi, Teruo
AU - Kiss, Takanobu
N1 - Funding Information:
Manuscript received August 29, 2017; accepted November 30, 2017. Date of publication December 13, 2017; date of current version January 18, 2018. This work was supported by the “JSPS: KAKENHI (16H02334).” (Corresponding author: Takumi Suzuki.) T. Suzuki, S. Omura, K. Imamura, M. Inoue, K. Higashikawa, and T. Kiss are with the Department of Electrical Engineering, Graduate School of Information Science and Electrical Engineering, Kyushu University, Fukuoka 819-0395, Japan (e-mail: suzuki@ees.kyushu-u.ac.jp).
Publisher Copyright:
© 2002-2011 IEEE.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2018/4
Y1 - 2018/4
N2 - We have investigated the in-field critical current properties in BaZrO3-added (Y, Gd) Ba2Cu 3O7-δ (YGdBCO)-coated conductor fabricated by using a multi-coating trifluoroacetates metal-organic deposition (MOD) method. We compared these properties with EuBCO-coated conductor fabricated by the pulsed laser deposition (PLD) method. The sample using the 30-nm once-coat-layer-thickness donce shows superior in-field Jc down to 4.2 K than that of the previous standard coating using 170-nm-thick layer for each coating. From the analysis of E-J characteristics, an analytical expression for Jc as a function T and B has been derived. It was confirmed that the high Jc region in sample with donce = 30 nm is widely spread in high-temperature and high-magnetic-field region. By comparison with the Jc properties of the BaHfO3 -added PLD CCs, the minimum Jc, which is estimated from magnetic field angle dependence, shows even higher value up to 5 T of magnetic field at 65 K and up to 3 T at 77 K. From these results, the new MOD-YGdBCO process using the thin once-coat-layer-thickness is very promising for the practically important mid field region such as 3 to 5 T.
AB - We have investigated the in-field critical current properties in BaZrO3-added (Y, Gd) Ba2Cu 3O7-δ (YGdBCO)-coated conductor fabricated by using a multi-coating trifluoroacetates metal-organic deposition (MOD) method. We compared these properties with EuBCO-coated conductor fabricated by the pulsed laser deposition (PLD) method. The sample using the 30-nm once-coat-layer-thickness donce shows superior in-field Jc down to 4.2 K than that of the previous standard coating using 170-nm-thick layer for each coating. From the analysis of E-J characteristics, an analytical expression for Jc as a function T and B has been derived. It was confirmed that the high Jc region in sample with donce = 30 nm is widely spread in high-temperature and high-magnetic-field region. By comparison with the Jc properties of the BaHfO3 -added PLD CCs, the minimum Jc, which is estimated from magnetic field angle dependence, shows even higher value up to 5 T of magnetic field at 65 K and up to 3 T at 77 K. From these results, the new MOD-YGdBCO process using the thin once-coat-layer-thickness is very promising for the practically important mid field region such as 3 to 5 T.
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U2 - 10.1109/TASC.2017.2782695
DO - 10.1109/TASC.2017.2782695
M3 - Article
AN - SCOPUS:85038873576
SN - 1051-8223
VL - 28
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 3
M1 - 8197366
ER -