TY - JOUR
T1 - Development of Long-Length BMO-Doped REBCO Coated Conductors by Hot-Wall PLD Process
AU - Fujita, Shinji
AU - Muto, Shogo
AU - Hirata, Wataru
AU - Adachi, Yutaka
AU - Yoshida, Tomo
AU - Igarashi, Mitsunori
AU - Kakimoto, Kazuomi
AU - Iijima, Yasuhiro
AU - Naoe, Kunihiro
AU - Kiss, Takanobu
AU - Okada, Tatsunori
AU - Awaji, Satoshi
N1 - Funding Information:
This work was supported in part by the High Field Laboratory for Superconducting Materials, IMR, Tohoku University, and in part by the New Energy and Industrial Technology Development Organization.
Funding Information:
Manuscript received September 15, 2017; accepted December 14, 2017. Date of publication January 10, 2018; date of current version January 19, 2018. This work was supported in part by the High Field Laboratory for Superconducting Materials, IMR, Tohoku University, and in part by the New Energy and Industrial Technology Development Organization. (Corresponding author: Shinji Fujita.) S. Fujita, S. Muto, W. Hirata, Y. Adachi, T. Yoshida, M. Igarashi, K. Kakimoto, Y. Iijima, and K. Naoe are with the Fujikura Ltd., Chiba 285-8550, Japan (e-mail: shinji.fujita@jp.fujikura.com).
PY - 2018/6
Y1 - 2018/6
N2 - Fujikura Ltd., Chiba, Japan, has developed stable and high-throughput production techniques for REBCO coated conductors (CC) by using large-area ion-beam-assisted-deposition (IBAD), and hot-wall type pulsed-laser-deposition (PLD). Recently, we have been attempting to dope BaMO3 (BMO, M: Zr or Hf) to REBCO layer in order to enhance in-field critical current density (Jc). In the course of optimizing deposition conditions of PLD for BaHfO3 doped EuBCO films on IBAD templates, "high Jc condition" and "high growth rate condition" were found. For samples prepared under these conditions, the magnetic field angle dependence of Ic and REBCO thickness dependence were investigated. Finally, we succeeded in fabricating a 300-m-long CC with uniform Ic distribution at the high-growth-rate condition. The longitudinal Ic homogeneity (defined as standard deviation divided by average) at 77 K evaluated by magnetization method was 2.6%, which is comparable to nondoped conductors. Transport in-field Ic for the both end points were 1756 and 1786 A/cm at 30 K, 2 T, respectively.
AB - Fujikura Ltd., Chiba, Japan, has developed stable and high-throughput production techniques for REBCO coated conductors (CC) by using large-area ion-beam-assisted-deposition (IBAD), and hot-wall type pulsed-laser-deposition (PLD). Recently, we have been attempting to dope BaMO3 (BMO, M: Zr or Hf) to REBCO layer in order to enhance in-field critical current density (Jc). In the course of optimizing deposition conditions of PLD for BaHfO3 doped EuBCO films on IBAD templates, "high Jc condition" and "high growth rate condition" were found. For samples prepared under these conditions, the magnetic field angle dependence of Ic and REBCO thickness dependence were investigated. Finally, we succeeded in fabricating a 300-m-long CC with uniform Ic distribution at the high-growth-rate condition. The longitudinal Ic homogeneity (defined as standard deviation divided by average) at 77 K evaluated by magnetization method was 2.6%, which is comparable to nondoped conductors. Transport in-field Ic for the both end points were 1756 and 1786 A/cm at 30 K, 2 T, respectively.
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U2 - 10.1109/TASC.2018.2791805
DO - 10.1109/TASC.2018.2791805
M3 - Article
AN - SCOPUS:85041231213
VL - 28
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 4
M1 - 8253535
ER -