Epitaxial nanostructure and defects effective for pinning in Y(RE)Ba2Cu3O7−x coated conductors

Yamada, Yutaka; Takahashi, Kazuhiro; Kobayashi, Hirokazu; Konishi, M.; Watanabe, T.; Ibi, A.; Muroga, T.; Miyata, S.; Kato, Takumi; Hirayama, Tsukasa; Shiohara, Yuh

doi:10.1063/1.2061874

Cited by 278 publications

(174 citation statements)

References 13 publications

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“…All the CC samples in Fig. 6 have no artificial pinning centers, and the difference of the magnetic field dependence of I c is likely due to the different microstructures and defects which act as natural pinning sites [44]. In the case of RCE-DR GdBCO CC tapes, almost similar J c -B relation was observed for both the samples with Hastelloy and stainless steel substrates [45].…”

Section: Strain Effect On I C Under Magnetic Field I C (ε B)supporting

confidence: 58%

Review of progress in electromechanical properties of REBCO coated conductors for electric device applications

Shin¹,

Dedicatoria²

2014

Progress in Superconductivity and Cryogenics

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Section: Strain Effect On I C Under Magnetic Field I C (ε B)supporting

confidence: 58%

Review of progress in electromechanical properties of REBCO coated conductors for electric device applications

Shin¹,

Dedicatoria²

2014

Progress in Superconductivity and Cryogenics

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“…In the early stage of the development in the PLD process for superconducting layers, the BaZrO 3 (BZO) nano-rods [19,20] were successfully dispersed and the J c and/or I c performance under the magnetic field, especially for the magnetic field parallel to the c-axis of the GdBCO crystals in the films, has been improved. However, the in-field I c values in thick films was saturated in the thickness dependence of I c (B).…”

Section: High I C Under Magnetic Fieldsmentioning

confidence: 99%

Progress in R＆D of coated conductor in M-PACC project

Izumi¹,

Ibi²,

Nakaoka³

et al. 2014

Progress in Superconductivity and Cryogenics

Self Cite

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The five-year national project in Japan for R&D of coated conductors and applications, named as the Materials and Power Applications of Coated Conductors (M-PACC) project, was finished at the end of FY2013. The project consists of four sub-themes as cable, transformer, SMES and coated conductors. In the theme of coated conductors, the fabrication process had been developed to satisfy the requirements from the applications such as in-field I c performance, low AC loss in the long tapes etc. Through the project, the remarkable progress was achieved as follows; a high in-field minimum I c value over 54A/cm-width under 3T at 77K was realized in a 200m long EuBCO tape with artificial pinning centers of BaHfO 3 by the pulsed laser deposition (PLD) technique on the IBAD template. On the other hand, the AC loss reduction was confirmed in the tapes fabricated by both PLD and the metal organic deposition (MOD) techniques by scribing 100m tapes into 10-filamments. Additionally, the mechanism of the delamination phenomenon was systematically investigated and the strength was improved by eliminating the origins of the weak points in the films. Through the development, all targeted goals were accomplished and the several results were appreciated as a world champion data.

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“…When single metal oxides, like ZrO 2 or CeO 2 nanoparticles are chosen, a large tendency exists to react with the Ba, giving rise to perovskite structure BaMO 3 (M= Zr, Ce) [6,61,72,73]. An undesirable consequence of this reaction is that cation stoichiometry becomes slightly uncompensated and so some Y 2 Cu 2 O 5 NPs remain which can be either pushed to the surface or trapped in the YBCO matrix and thus may play some role as current limiting defects ( Figure 12b).…”

Section: Reactivity and Coarsening Of The Nanoparticles In The Ybco Filmmentioning

confidence: 99%

Epitaxial YBa₂Cu₃O_7−xnanocomposite thin films from colloidal solutions

Cayado

Keukeleere

Garzón

et al. 2015

Supercond. Sci. Technol.

111

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A methodology of general validity to prepare epitaxial nanocomposite films is reported based on the use of colloidal solutions containing different crystalline preformed oxide nanoparticles (ex-situ nanocomposites). The trifluoroacetate (TFA) metal-organic chemical solution deposition route is used with alcoholic solvents to grow epitaxial YBa 2 Cu 3 O 7 (YBCO) films. For that reason stabilizing oxide nanoparticles in polar solvents is a challenging goal. We have used scalable nanoparticle synthetic methodologies such as thermal and microwave-assisted solvothermal techniques to prepare CeO 2 and ZrO 2 nanoparticles. We show that stable and homogeneous colloidal solutions with these nanoparticles can be reached using benzyl alcohol, triethyleneglycol, nonanoic acid, trifluoroacetic acid or decanoic acid as protecting ligands, thereby allowing subsequent mixing with alcoholic TFA solutions. An elaborate YBCO film growth analysis on these nanocomposites allows the identification of the different relevant growth phenomena, e.g. nanoparticle pushing towards the film surface, nanoparticle reactivity, coarsening and nanoparticle accumulation at the substrate interface. Upon mitigation of these effects, YBCO nanocomposite films with high self-field critical currents (J c 3-4 MA/cm 2 at 77 K) were reached, indicating no current limitation effects associated to epitaxy perturbation, while smoothed magnetic field dependences of the critical currents at high magnetic fields and decreased effective anisotropic pinning behavior confirms the effectiveness of the novel developed approach to enhance vortex pinning. In conclusion, a novel low cost solution-derived route to high current nanocomposite superconducting films and coated conductors has been developed with very promising features.

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Epitaxial nanostructure and defects effective for pinning in Y(RE)Ba2Cu3O7−x coated conductors

Cited by 278 publications

References 13 publications

Review of progress in electromechanical properties of REBCO coated conductors for electric device applications

Review of progress in electromechanical properties of REBCO coated conductors for electric device applications

Progress in R＆D of coated conductor in M-PACC project

Epitaxial YBa₂Cu₃O_7−xnanocomposite thin films from colloidal solutions

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Epitaxial nanostructure and defects effective for pinning in Y(RE)Ba2Cu3O7−x coated conductors

Cited by 278 publications

References 13 publications

Review of progress in electromechanical properties of REBCO coated conductors for electric device applications

Review of progress in electromechanical properties of REBCO coated conductors for electric device applications

Progress in R＆D of coated conductor in M-PACC project

Epitaxial YBa2Cu3O7−xnanocomposite thin films from colloidal solutions

Contact Info

Product

Resources

About

Epitaxial YBa₂Cu₃O_7−xnanocomposite thin films from colloidal solutions