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記事

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.

元の言語英語
記事番号8629911
ジャーナルIEEE Transactions on Applied Superconductivity
29
発行部数5
DOI
出版物ステータス出版済み - 1 1 2019

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Flux pinning
flux pinning
Pulsed laser deposition
Deposition rates
pulsed laser deposition
conductors
Precipitates
precipitates
critical current
Anisotropy
Europium
Superconducting wire
high field magnets
Ion beam assisted deposition
anisotropy
Critical currents
europium
Rare earths
Magnets
Electron microscopes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

これを引用

Flux-pinning properties of BaHfO 3 -doped EuBCO-coated conductors fabricated by Hot-Wall PLD . / Fujita, Shinji; Muto, Shogo; Hirata, Wataru; Yoshida, Tomo; Kakimoto, Kazuomi; Iijima, Yasuhiro; Daibo, Masanori; Kiss, Takanobu; Okada, Tatsunori; Awaji, Satoshi.

:: IEEE Transactions on Applied Superconductivity, 巻 29, 番号 5, 8629911, 01.01.2019.

研究成果: ジャーナルへの寄稿記事

Fujita, S, Muto, S, Hirata, W, Yoshida, T, Kakimoto, K, Iijima, Y, Daibo, M, Kiss, T, Okada, T & Awaji, S 2019, ' Flux-pinning properties of BaHfO 3 -doped EuBCO-coated conductors fabricated by Hot-Wall PLD ' IEEE Transactions on Applied Superconductivity, 巻. 29, 番号 5, 8629911. https://doi.org/10.1109/TASC.2019.2896535
Fujita, Shinji ; Muto, Shogo ; Hirata, Wataru ; Yoshida, Tomo ; Kakimoto, Kazuomi ; Iijima, Yasuhiro ; Daibo, Masanori ; Kiss, Takanobu ; Okada, Tatsunori ; Awaji, Satoshi. / Flux-pinning properties of BaHfO 3 -doped EuBCO-coated conductors fabricated by Hot-Wall PLD :: IEEE Transactions on Applied Superconductivity. 2019 ; 巻 29, 番号 5.
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abstract = "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.",
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