Improvement of flux pinning performance at high magnetic fields in GdBa2Cu3Oycoated conductors with BHO nano-rods through enhancement ofBc2

Matsushita, Teruo; Nagamizu, H; Tanabe, K.; Kiuchi, M.; Otabe, Edmund Soji; Tobita, Hiromi; Yoshizumi, M.; Izumi, Teruo; Shiohara, Yuh; Yokoe, Daisaku; Kato, Tomohiro; Hirayama, Tsukasa

doi:10.1088/0953-2048/25/12/125003

Cited by 48 publications

(25 citation statements)

References 20 publications

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“…To take into account the effect of fluctuations, J c0 (creep-free J c ) must be calculated that is then added to the NP contribution using statistical summation. 63 T; H; y ð…”

Section: Dramatically Higher J C With Nearly Isotropic Angular Dependmentioning

confidence: 99%

Tuning nanoparticle size for enhanced functionality in perovskite thin films deposited by metal organic deposition

et al. 2017

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Because of pressing global environmental challenges, focus has been placed on materials for efficient energy use, and this has triggered the search for nanostructural modification methods to improve performance. Achieving a high density of tunable-sized second-phase nanoparticles while ensuring the matrix remains intact is a long-sought goal. In this paper, we present an effective, scalable method to achieve this goal using metal organic deposition in a perovskite system REBa 2 Cu 3 O 7 (rare earth (RE)) that enhances the superconducting properties to surpass that of previous achievements. We present two industrially compatible routes to tune the nanoparticle size by controlling diffusion during the nanoparticle formation stage by selecting the second-phase material and modulating the precursor composition spatially. Combining these routes leads to an extremely high density (8 × 10 22 m − 3 ) of small nanoparticles (7 nm) that increase critical currents and reduce detrimental effects of thermal fluctuations at all magnetic field strengths and temperatures. This method can be directly applied to other perovskite materials where nanoparticle addition is beneficial.

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“…To take into account the effect of fluctuations, J c0 (creep-free J c ) must be calculated that is then added to the NP contribution using statistical summation. 63 T; H; y ð…”

Section: Dramatically Higher J C With Nearly Isotropic Angular Dependmentioning

confidence: 99%

Tuning nanoparticle size for enhanced functionality in perovskite thin films deposited by metal organic deposition

et al. 2017

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“…PLD and MOCVD lead to the formation of anisotropic nanorods (∼5 nm in diameter, >100 nm in length) that grow along the c-axis [36,37]. The intrinsic weak pinning in the magnetic field parallel to the c-axis is thus reinforced by the interaction between nanorods and vortices.…”

Section: Reactive Co-evaporation (Rce)mentioning

confidence: 99%

Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductors

Senatore

Alessandrini

Lucarelli

et al. 2014

Supercond. Sci. Technol.

247

136

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Recent progresses in the second generation REBa 2 Cu 3 O 7 − x (RE123) coated conductor (CC) have paved a way for the development of superconducting solenoids capable of generating fields well above 23.5 T, i.e. the limit of NbTi−Nb 3 Sn-based magnets. However, the RE123 magnet still poses several fundamental and engineering challenges. In this work we review the state-ofthe-art of conductor and magnet technologies. The goal is to illustrate a close synergetic relationship between evolution of high-field magnets and advancement in superconductor technology. The paper is organized in three parts: (1) the basics of RE123 CC fabrication technique, including latest developments to improve conductor performance and production throughput; (2) critical issues and innovative design concepts for the RE123-based magnet; and (3) an overview of noteworthy ongoing magnet projects.

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“…The reports show that by effective pinning of flux lines, the vortex movements can be prevented and thereby increases the critical current density. Therefore, it is of current interest to prepare samples with appropriate artificial pinning centers to increase the critical current density and flux‐pinning force ( F p ) . The doping of impurities with size of the order of the coherence length ( ξ ) or creation of nanosize defects in the system by adjusting the processing condition can create effective pinning centers.…”

Section: Introductionmentioning

confidence: 99%

Flux-pinning properties of nanocrystalline HfO₂ added YBa₂ Cu₃ O_7−δ superconductor

Rejith¹,

Vidya²,

Vipinlal³

et al. 2013

Phys. Status Solidi B

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The effect of addition of different weight percentages of nanocrystalline HfO2, synthesized through a modified combustion method in bulk coarse‐grained orthorhombic YBa2Cu3O7−δ powder was studied. The structure and microstructure of the samples examined by X‐ray diffraction (XRD) and scanning electron microscopy (SEM) showed the formation of a secondary phase YBa2HfO5.5 in the superconductor without deteriorating the superconducting properties. The variation of sintering temperature, density, critical transition temperature (Tc), magnetic field dependence of critical current density (Jc), and flux‐pinning force (Fp) of YBa2Cu3O7−δ having different proportions of YBa2HfO5.5 formed in the matrix were studied in detail. The samples showed a transition temperature (Tc) of ∼92 K and the self‐field critical current density (Jc) increases significantly up to an optimum value of 5.42 × 104 A cm−2 for 2 wt% addition of nano HfO2. The enhancement of the critical current density in the YBa2Cu3O7−δ‐HfO2 samples is attributed to the presence of the nonreacting YBa2HfO5.5 phase, formed due to the addition of HfO2 as artificial pinning center. The formation of YBa2HfO5.5 in YBa2Cu3O7−δ bulk superconductor also enhances the pinning force density from 3 × 106 to 30.4 × 106 N m−3 at 77 K.

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Improvement of flux pinning performance at high magnetic fields in GdBa₂Cu₃O_ycoated conductors with BHO nano-rods through enhancement ofB_c2

Cited by 48 publications

References 20 publications

Tuning nanoparticle size for enhanced functionality in perovskite thin films deposited by metal organic deposition

Tuning nanoparticle size for enhanced functionality in perovskite thin films deposited by metal organic deposition

Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductors

Flux-pinning properties of nanocrystalline HfO₂ added YBa₂ Cu₃ O_7−δ superconductor

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Improvement of flux pinning performance at high magnetic fields in GdBa2Cu3Oycoated conductors with BHO nano-rods through enhancement ofBc2

Cited by 48 publications

References 20 publications

Tuning nanoparticle size for enhanced functionality in perovskite thin films deposited by metal organic deposition

Tuning nanoparticle size for enhanced functionality in perovskite thin films deposited by metal organic deposition

Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductors

Flux-pinning properties of nanocrystalline HfO2 added YBa2 Cu3 O7−δ superconductor

Contact Info

Product

Resources

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Improvement of flux pinning performance at high magnetic fields in GdBa₂Cu₃O_ycoated conductors with BHO nano-rods through enhancement ofB_c2

Flux-pinning properties of nanocrystalline HfO₂ added YBa₂ Cu₃ O_7−δ superconductor