Development of Long REBCO Coated Conductors by PLD-REBCO/Sputter-CeO<sub>2</sub>/IBAD-MgO at SJTU and SSTC

Liu, Liuming; Li, Y.; Wu, Xiang; Xiao, Guina; Xu, Da

doi:10.1109/tasc.2014.2385866

Cited by 9 publications

(5 citation statements)

References 10 publications

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“…The reader should note that the absolute values of J c presented in this work are not comparable to the values presented in other associated publications, such as in refs , where higher values of J c are reported. This is due to the following reasons.…”

Section: Introductionmentioning

confidence: 99%

Strongly Enhanced Growth of High-Temperature Superconducting Films on an Advanced Metallic Template

Khan

Rivasto

Rijckaert

et al. 2022

Crystal Growth & Design

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We demonstrate a straightforward and easily applied technique for growing BaZrO 3 doped YBa 2 Cu 3 O 6+x films of highly improved quality on a commercially used buffered metallic template by pulsed laser deposition. Our method relies on reducing the grain size of the target material, which completely prevents the transfer of the harmful grain boundaries or weak links from the substrate through the buffer layers on the deposited film. We have also observed a great improvement in the self-assembly of BaZrO 3 dopants, and the critical current density is increased in the high temperature range up to 40%. As an extra benefit, our method allows us to increasing the growth rate of the film by 25%. We have discussed the results comprehensively and provided quantitative insight into the underlying mechanisms. The presented technique can be considered a groundbreaking advancement for the vastly growing coated conductor industry.

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Section: Introductionmentioning

confidence: 99%

Strongly Enhanced Growth of High-Temperature Superconducting Films on an Advanced Metallic Template

Khan

Rivasto

Rijckaert

et al. 2022

Crystal Growth & Design

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“…On the conductor development side, the introduction and development of artificial pinning centers (APCs) have resulted in a remarkable improvement of in-field performance over a wide range of temperatures and fields . In addition, the problems associated with the growth of thicker (>1 µm) films without degradation of critical current density (J c ) have been addressed [14][15][16][17][35][36][37][38][39][40][41][42][43][44][45][46][47], resulting in a notable increase in CC performance via growth of >4 µm thick films with optimized APCs, as demonstrated for intermediate temperatures and fields (30-50 K, 3-7 T), as well as at 4.2 K and fields up to 31.2 T [15,16,33].…”

Section: Introductionmentioning

confidence: 99%

Scanning Raman spectroscopy for inline characterization of 2G-HTS conductors

Castaneda¹,

Majkic²,

Robles³

2021

Supercond. Sci. Technol.

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We report on a feasibility study of using Raman micro-spectroscopy as a characterization method for quality control of REB a 2 C u 3 O 7 − δ (REBCO, rare-earth barium copper oxide) coated conductors (CC). Fragments of long REBCO tape deposited using advanced metal organic chemical vapor deposition with dropouts in critical current (I c) were analyzed implementing Raman spectroscopy in area scan (map) and linear scan modes, in order to evaluate the level of information obtainable with the technique. The areal maps have been found to provide detailed information on the spatial distribution of the sample quality, providing maps of both intensity and wavelength shift characteristic of Raman-active peaks. The maps readily identify defective regions ranging from completely misoriented a-axis domains (REBCO a-axis || sample normal), as well as regions with well-textured c-axis orientation (REBCO c-axis || sample normal) but with significant variation in cation disorder. The results are complemented with linear scans carried out by two-dimensional x-ray diffraction, which do identify the a-axis grain regions but do not detect any apparent anomaly in the cation-disordered region detected by Raman micro-spectroscopy. The results indicate that scanning Raman spectroscopy has the potential to be utilized as a fast, insightful, and reliable characterization, quality, and process control technique for both CC optimization and increase of manufacturing yield.

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“…Significant progress in understanding and overcoming obstacles to growing thick REBCO films with high current densities has been made in recent years [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Additionally, the understanding and control of the parameters influencing the effectiveness of artificial pinning centers (APC) in increasing in-field critical currents has significantly progressed from both fundamental and processing aspects [16-18, 20, 33-61].…”

Section: Introductionmentioning

confidence: 99%

In-field critical current performance of 4.0 μm thick film REBCO conductor with Hf addition at 4.2 K and fields up to 31.2 T

Majkic

Pratap

Paidpilli

et al. 2020

Supercond. Sci. Technol.

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We present results on the in-field critical current (I c ) performance of 4.0 µm thick REBCO film with 15% Hf addition with fields up to 31.2 T and field orientations in the B∥ab plane and B∥c axis. Unlike the behavior at B∥c, the critical current at B∥ab is only very weakly dependent on field, decreasing from self-field to 31.2 T by only 22%, i.e. from the self-field value of ∼7700 A/4 mm width to ∼6300 and 5812 A/4 mm width at 14 and 30 T, respectively. These values are remarkably 3 and 5.7x higher than the corresponding critical currents at B∥c. The in-field behavior of the present 15% Hf sample at field orientation B∥c axis is nearly identical to the previously reported record values found in 4.3 and 4.6 µm thick 15% Zr samples in terms of critical current density. In contrast to the pinning force behavior in the B∥c orientation, which saturates to a constant value of 1.7 TN m −3 above ∼5-6 T, the pinning force in the B∥ab orientation increases near-linearly, reaching a remarkable value of over 11.5 TN m −3 at 31.2 T. These results demonstrate the potential of thick REBCO conductors at 4.2 K for high field and energy density applications, in particular where the magnetic field is contained near the ab-plane.

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Development of Long REBCO Coated Conductors by PLD-REBCO/Sputter-CeO₂/IBAD-MgO at SJTU and SSTC

Cited by 9 publications

References 10 publications

Strongly Enhanced Growth of High-Temperature Superconducting Films on an Advanced Metallic Template

Strongly Enhanced Growth of High-Temperature Superconducting Films on an Advanced Metallic Template

Scanning Raman spectroscopy for inline characterization of 2G-HTS conductors

In-field critical current performance of 4.0 μm thick film REBCO conductor with Hf addition at 4.2 K and fields up to 31.2 T

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Development of Long REBCO Coated Conductors by PLD-REBCO/Sputter-CeO2/IBAD-MgO at SJTU and SSTC

Cited by 9 publications

References 10 publications

Strongly Enhanced Growth of High-Temperature Superconducting Films on an Advanced Metallic Template

Strongly Enhanced Growth of High-Temperature Superconducting Films on an Advanced Metallic Template

Scanning Raman spectroscopy for inline characterization of 2G-HTS conductors

In-field critical current performance of 4.0 μm thick film REBCO conductor with Hf addition at 4.2 K and fields up to 31.2 T

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Product

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Development of Long REBCO Coated Conductors by PLD-REBCO/Sputter-CeO₂/IBAD-MgO at SJTU and SSTC