Flux-pinning properties of BaHfO 3 -doped EuBCO-coated conductors fabricated by Hot-Wall PLD

Shinji Fujita, Shogo Muto, Wataru Hirata, Tomo Yoshida, Kazuomi Kakimoto, Yasuhiro Iijima, Masanori Daibo, Takanobu Kiss, Tatsunori Okada, Satoshi Awaji

研究成果: ジャーナルへの寄稿学術誌査読

24 被引用数 (Scopus)

抄録

REBa 2 Cu 3 O x (REBCO, RE = rare earth) coated conductors (CCs) are promising as superconducting wires for high-field magnets because of their high in-field critical current density (J c ) performance and high tensile tolerance. Fujikura, Ltd., has been developing BaHfO 3 (BHO)-doped EuBa 2 Cu 3 O x (EuBCO, Eu = Europium) CCs using a hot-wall-type pulsed-laser deposition (PLD) in order to further improve the in-field performance. Although a high deposition rate in the PLD process is necessary for mass production, it has been found that the in-field performance greatly differ depending on the deposition rate. In this study, flux pinning properties of BHO-doped EuBCO CCs fabricated with different deposition rates by the hot-wall PLD on IBAD substrates were investigated in detail. From the scaling characteristics of the flux-pinning force density (F p ) curve, the BHO precipitates in a fast deposition rate REBCO film appeared to behave like random pinning centers, which was almost consistent with a result of transmission electron microscope observation. On the other hand, from a decrease of anisotropy in the magnetic field angle dependence of J c , it was also confirmed that BHO precipitates were not completely random pinning centers, that is, it has some kind of anisotropy. Considering the critical current value per production time, it was also found that the fast deposition rate is advantageous since the REBCO layer could be thicker.

本文言語英語
論文番号8629911
ジャーナルIEEE Transactions on Applied Superconductivity
29
5
DOI
出版ステータス出版済み - 2019

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学

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