In-field critical current performance of 4.0 <i>μ</i>m thick film REBCO conductor with Hf addition at 4.2 K and fields up to 31.2 T

Majkic, Goran; Pratap, Rudra; Paidpilli, Mahesh; Galstyan, Eduard; Kochat, Mehdi; Goel, Chirag; Kar, Soumen; Jaroszyński, J.; Abraimov, D.; Selvamanickam, V.

doi:10.1088/1361-6668/ab9541

Cited by 31 publications

(25 citation statements)

References 59 publications

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“…Further insight into the effects of the combination of increasing Jd and enhancing flux pinning can be obtained from the field dependence of Jc. Compared with overdoped standard Y123 at 5 K [16], the enhancement of our overdoped (Y,Gd)123+BHO CC is 144% at self-field and 199% at 5 T. Moreover, compared to that in coherent BHO doped CCs [59], the Jc(H||c) of our CC shows a 254% increase at 1 T and 175% increase at 18…”

Section: Discussionmentioning

confidence: 64%

Thermodynamic approach for enhancing superconducting critical current performance

et al. 2022

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The addition of artificial pinning centers has led to an impressive increase in the critical current density (Jc) of superconductors, enabling record-breaking all-superconducting magnets and other applications. The Jc of superconductors has reached ~0.2–0.3 Jd, where Jd is the depairing current density, and the numerical factor depends on the pinning optimization. By modifying λ and/or ξ, the penetration depth and coherence length, respectively, we can increase Jd. For (Y0.77Gd0.23)Ba2Cu3Oy ((Y,Gd)123), we can achieve this by controlling the carrier density, which is related to λ and ξ. We can also tune λ and ξ by controlling the chemical pressure in Fe-based superconductors, i.e., BaFe2(As1−xPx)2 films. The variation in λ and ξ leads to an intrinsic improvement in Jc via Jd, allowing extremely high values of Jc of 130 MA/cm2 and 8.0 MA/cm2 at 4.2 K, consistent with an enhancement in Jd of a factor of 2 for both incoherent nanoparticle-doped (Y,Gd)123 coated conductors (CCs) and BaFe2(As1−xPx)2 films, showing that this new material design is useful for achieving high critical current densities in a wide array of superconductors. The remarkably high vortex-pinning force in combination with this thermodynamic and pinning optimization route for the (Y,Gd)123 CCs reached ~3.17 TN/m3 at 4.2 K and 18 T (H||c), the highest values ever reported for any superconductor.

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Section: Discussionmentioning

confidence: 64%

Thermodynamic approach for enhancing superconducting critical current performance

et al. 2022

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“…A common approach to enhance J c in magnetic field has been to introduce artificial pinning centres (APC) of c-axis correlated nano-columns of various perovskites [21][22][23][24][25] , a technique utilised in commercial PLD 28,29,38 and metalorganic chemical vapour deposition (MOCVD) film growth 6 . Although the highest J c (B) values have been obtained in this way [39][40][41] , the complex HTS film nanostructure results in considerable spread in commercial wire in-field performance 26,27 and greatly narrows the processing window, requiring slower deposition rates to achieve maximum J c enhancement 28,29 . For 2G HTS wire with nano-columnar APC, more typical is a faster decay of critical current with increasing magnetic field than for wire without APC 42 .…”

Section: Discussionmentioning

confidence: 99%

“…To further increase J E , we deposited thick YBCO films on a thin (40 μm thick) substrate. Although both these approaches are straightforward and are generally followed for the purpose 6,21,[39][40][41]50,51 , they are nontrivial to implement in economical, high yield production. For thick REBCO films typical is the decay of microstructure and J c when the film thickness exceeds 1 micron.…”

Section: Methodsmentioning

confidence: 99%

Development and large volume production of extremely high current density YBa2Cu3O7 superconducting wires for fusion

Molodyk¹,

Samoilenkov²,

Маркелов³

et al. 2021

Sci Rep

137

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The fusion power density produced in a tokamak is proportional to its magnetic field strength to the fourth power. Second-generation high temperature superconductor (2G HTS) wires demonstrate remarkable engineering current density (averaged over the full wire), JE, at very high magnetic fields, driving progress in fusion and other applications. The key challenge for HTS wires has been to offer an acceptable combination of high and consistent superconducting performance in high magnetic fields, high volume supply, and low price. Here we report a very high and reproducible JE in practical HTS wires based on a simple YBa2Cu3O7 (YBCO) superconductor formulation with Y2O3 nanoparticles, which have been delivered in just nine months to a commercial fusion customer in the largest-volume order the HTS industry has seen to date. We demonstrate a novel YBCO superconductor formulation without the c-axis correlated nano-columnar defects that are widely believed to be prerequisite for high in-field performance. The simplicity of this new formulation allows robust and scalable manufacturing, providing, for the first time, large volumes of consistently high performance wire, and the economies of scale necessary to lower HTS wire prices to a level acceptable for fusion and ultimately for the widespread commercial adoption of HTS.

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“…Therefore, a 12 mm-wide tape was obtained with a J c exceeding 1611 A (77 K, s.f. ), achieving the effect that the critical current of the tape increases linearly with the thickness [81][82][83] . In 2020, they successfully prepared an optimized REBCO sample with 15% mol.…”

Section: Development Process Of 2g-hts Tapesmentioning

confidence: 99%

Advances in second-generation high-temperature superconducting tapes and their applications in high-field magnets

Wang¹,

Dong²,

Huang³

et al. 2022

Soft Sci

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Second-generation high-temperature superconducting (2G-HTS) tapes based on REBa2Cu3O7-x (REBCO, RE: rare earth) materials enable the energy-efficient and high-power-density delivery of electricity, thereby promoting the development of clean energy generation, conversion, transmission, and storage. To overcome the weak grain-boundary connection and poor mechanical properties of these superconductors, a thin-film technology for epitaxy and biaxial textures based on flexible substrates has been developed. In recent years, high-quality 2G-HTS tapes have been produced at the kilometer scale and used in superconducting demonstration projects. This review first summarizes the development of HTS materials and briefly expounds the properties of REBCO superconducting materials. Subsequently, the structural characteristics, preparation methods, and current research progress of 2G-HTS tapes are given. In addition, the applications of REBCO tapes in constructing high-field magnets are also briefly reviewed.

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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

Cited by 31 publications

References 59 publications

Thermodynamic approach for enhancing superconducting critical current performance

Thermodynamic approach for enhancing superconducting critical current performance

Development and large volume production of extremely high current density YBa2Cu3O7 superconducting wires for fusion

Advances in second-generation high-temperature superconducting tapes and their applications in high-field magnets

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