Influence of starting solution composition on superconducting properties of YBCO coated conductors by advanced TFA-MOD process

Nakaoka, K.; Matsuda, Junko; Kitoh, Y.; Goto, T.; Yamada, Yutaka; Izumi, Teruo; Shiohara, Yuh

doi:10.1016/j.physc.2007.04.264

Cited by 72 publications

(39 citation statements)

References 6 publications

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“…Other researchers [14][15][16] have reported similar results to ours, and tried to explain the reason for the difference in J c values by analyzing microstructure with TEM. Nakaoka et al [14] reported the effect of the composition of the coating [15] reported the microstructure evolutions of YBCO films with the Ba/Y ratio of 1.4 and 2.0.…”

Section: Resultssupporting

confidence: 80%

“…3(c). Several groups [14,15] reported that the secondary phases existing within the YBCO matrix from the the Ba-deficient coating solution were Y 2 Cu 2 O 5 and CuO by the TEM analyses. Although not presented, Y 2 Cu 2 O 5 nanoparticles trapped in the YBCO matrix were also observed by TEM in our samples.…”

Section: Resultsmentioning

confidence: 99%

“…Nakaoka et al [14] reported the effect of the composition of the coating [15] reported the microstructure evolutions of YBCO films with the Ba/Y ratio of 1.4 and 2.0. According to their report, the YBCO growth rate from the precursor solution with the Ba/Y ratio of 1.4 was uniform along the ab-plane while the YBCO growth rate from the Ba/Y ratio of 2.0 was non-uniform along the ab-plane, and thus the YBCO growth front along the c-axis direction was not flat but bumped, suggesting higher probability to trap the second phases within the YBCO matrix.…”

Section: Resultsmentioning

confidence: 99%

“…Then, we tried to produce high-I c YBCO films from the Ba-deficient coating solution since the YBCO films from the Ba-deficient coating solution were reported to exhibit higher J c values compared with that from the stoichiometric one [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

High-<TEX>$I_c$</TEX> single-coat YBCO films prepared by the MOD process

Lee¹,

Shin²,

Yoo³

2011

Progress in Superconductivity and Cryogenics

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High-<TEX>$I_c$</TEX> single-coat YBCO films prepared by the MOD process

Lee¹,

Shin²,

Yoo³

2011

Progress in Superconductivity and Cryogenics

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“…The effective magnetic field scaling function for some conductors, particularly ReBCOcoated conductors, is not necessarily monotonously increasing with angle, but more importantly not fully determined by its values at 0 and 90 degrees [94,95,96,97]. It is no longer the component perpendicular to a grain that solely determines its J e , as pinning on stacking faults, [96], artificial pinning sites and 124-type intergrowths [98] can have significant influence on the anisotropy in J e .…”

Section: Three Cases Of Anisotropymentioning

confidence: 99%

High-temperature superconductors in high-field magnets

Weijers

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Preface and acknowledgementThis thesis deals with selected topics out of a wide research and development effort on HTS insert coil technology. Its origin goes back to the founding charter of the NHMFL in the year 1988 which listed the goal of realizing a 25 T superconducting magnet as one of the milestones the NHMFL was to achieve. High-temperature superconductors had only just been discovered and the required technology was non-existent. The path to where we are now has been eventful and a real learning experience. From the early days in the mid-1990-ies of the 'Wind and Pray" approach when coil testing relentlessly pointed out the shortcomings of both conductor and coil technologies at the time to the first successful "mini-coils" (around coil number 70) to the successive 1 T, 3 T and 5 T inserts (the latter reaching 25 T and bringing the total of numbered coils over 300 a decade later) to the promise of 30 + T superconducting user magnets with coated conductors in the not-toodistant future.Lacking the funds to buy the very expensive conductors, a collaboration was established with industry. This approach has served us well and resulted in a wide assortment of conductors to work with. New superconductors were donated in exchange for feedback on its performance as observed in our magnet technology development program. We also tested complete coils built by ourselves or by partners, in background magnetic field, a task for which the NHMFL facilities are well suited.This work is centered on the 5T insert coil for a total magnetic field of 25 T, but the research and development effort is interwoven with and inseparable from the broader HTS insert coil technology development program. Therefore discussions on a wider range of conductors and coils in line with the broader scope of this thesis are presented.While I take full responsibility for the described NHMFL insert coil designs, analysis and interpretation of the data on coils and conductors, having executed or been directly involved with all experiments described and having wound many a coil, this work has had the benefit of many direct and indirect contributions of a large number of people inside and outside the NHMFL. In contrast, developing this thesis itself has been the loneliest work I have ever done, but ultimately just as rewarding. There are many people that I would like to thank for their contributions to the HTS insert program in general and this thesis in particular.

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A review of vortex pinning in REBa₂Cu₃O_7‐x coated conductors

Wang,

Huang,

Ding

et al. 2024

cMat

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REBa2Cu3O7‐x (REBCO) exhibits outstanding qualities such as a high irreversible field (7 T) and strong current‐carrying capacity (77 K, 106 A cm−2), making it ideal for high magnetic field applications such as fusion, accelerators, and nuclear magnetic resonance. However, the degradation of in‐field critical current density (Jc) due to vortex motion is a significant hurdle. Research indicates that improving vortex pinning can notably enhance Jc in REBCO, showing promise for its future high‐field applications. This review explores vortex pinning mechanisms, artificial pinning centers (APCs), and how environmental conditions affect pinning characteristics, highlighting advancements in vortex pinning for REBCO in magnetic fields. Different methods for introducing APCs are discussed and compared for evaluating their efficacy in achieving optimal nanoparticle distributions and consequent superconducting performance improvements, underscoring the importance of nano‐defect features (type, size, and distribution) in optimizing the superconducting properties of the REBCO. Additionally, the review tackles current challenges, shares recent research breakthroughs, and outlines future research directions for designing pinning landscapes to further improve REBCO performance.

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Influence of starting solution composition on superconducting properties of YBCO coated conductors by advanced TFA-MOD process

Cited by 72 publications

References 6 publications

High-<TEX>$I_c$</TEX> single-coat YBCO films prepared by the MOD process

High-<TEX>$I_c$</TEX> single-coat YBCO films prepared by the MOD process

High-temperature superconductors in high-field magnets

A review of vortex pinning in REBa₂Cu₃O_7‐x coated conductors

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Influence of starting solution composition on superconducting properties of YBCO coated conductors by advanced TFA-MOD process

Cited by 72 publications

References 6 publications

High-<TEX>$I_c$</TEX> single-coat YBCO films prepared by the MOD process

High-<TEX>$I_c$</TEX> single-coat YBCO films prepared by the MOD process

High-temperature superconductors in high-field magnets

A review of vortex pinning in REBa2Cu3O7‐x coated conductors

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Product

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A review of vortex pinning in REBa₂Cu₃O_7‐x coated conductors