Strongly enhanced pinning force density in YBCO–BaTiO3 nanocomposite superconductor

Jha, Alok K.; Khare, Neeraj

doi:10.1016/j.physc.2009.05.008

Cited by 47 publications

(10 citation statements)

References 13 publications

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“…There are several reports in the recent past in which the vortex pinning properties of REBCO superconductors has been improved by intentionally adding non-superconducting secondary phase nanoparticles. Incorporation of different secondary phases such as Al 2 O 3 [71], TiO 2 [72], WO 3 [73], BaTiO 3 [74], BaZrO 3 [75,76] etc. into YBCO polycrystalline bulk samples have been reported in the past which resulted in the enhancement of in-field J c of YBCO bulk samples.…”

Section: Nanoscale Secondary Phase Inclusions/rebco Based Nanocompositesmentioning

confidence: 99%

Superconductive REBCO Thin Films and Their Nanocomposites: The Role of Rare-Earth Oxides in Promoting Sustainable Energy

Jha

Matsumoto

2019

Front. Phys.

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The lossless transmission of direct electrical currents in superconductors is very often regarded as an "energy superhighway" with greatly enhanced efficiency. With the discovery of high temperature superconductors (HTS) in the late eighties, the prospect of using these materials in efficient and advanced technological applications became very prominent. The elevated operating temperatures as compared to low temperature superconductors (LTS), relaxing cooling requirements, and the gradual development of facile synthesis processes raised hopes for a broad breakthrough of superconductor technology. The impact of superconductor technology on the economy and energy sectors is predicted to be huge if these are utilized on a large scale. The development of superconducting tapes with high critical current density (J c) is crucial for their use in transmission cables. Many countries these days are running projects to develop wires from these HTS materials and simultaneously field trials are being conducted to assess the feasibility of this technology. These HTS wires can carry electrical currents more than 100 times larger than their conventional counterparts with minimal loss of energy. The increased efficiency of HTS electric power products may result in greatly reduced carbon emissions compared to those resulting from using the conventional alternatives. In order to use the thin films of YBa 2 Cu 3 O 7−δ (YBCO) and REBCO [RE (rare-earth) = Sm, Gd, Eu etc.], members of the HTS family, for future technological applications, the enhancement of J c over wide range of temperatures and applied magnetic fields is highly desired. The enhancement of J c of YBCO and REBCO films has been successfully demonstrated by employing different techniques which include doping by rare-earth atoms, incorporating nanoscale secondary phase inclusions into the REBCO film matrix, decoration of the substrate surface etc. which generate artificial pinning centers (APCs). In this review, the development of the materials engineering aspect that has been conducted over the last two decades to improve the current carrying capability of HTS thin films is presented. The effect of controlled incorporation of APCs through various methods and techniques on the superconducting properties of YBCO and REBCO thin films is presented, heading toward superior performance of such superconducting thin films.

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Section: Nanoscale Secondary Phase Inclusions/rebco Based Nanocompositesmentioning

confidence: 99%

Superconductive REBCO Thin Films and Their Nanocomposites: The Role of Rare-Earth Oxides in Promoting Sustainable Energy

Jha

Matsumoto

2019

Front. Phys.

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“…3(a)) and calcined powder (Fig. 3(b)) was analyzed by XRD (10). The diffraction peak of φ103, φ020 and φ123 were confirmed.…”

Section: Resultsmentioning

confidence: 89%

Research of YBCO Superconductor Coating on Austenitic Stainless Steel by Electrophoretic Deposition

Sato¹,

Koura²

2021

Preprint

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Yttrium-based superconductors (YBCO) haven’t been widely applied. One reason is because of its high cost. In this research, we replaced the substrate and the fabrication method with a lower and found the possibility of fabricating high-performance superconducting wires. Specifically, the YBCO layer was fabricated by electrophoretic deposition (EPD). However, this method requires calcination. It has been known that Fe in the substrate diffuses into the YBCO layer during calcination, and this phenomenon causes deterioration of YBCO performance. Therefore, CeO2 was fabricated as a diffusion prevention layer between the substrate and the YBCO layer. It showed the possibility of preventing the diffusion of Fe. Meanwhile, a textured CeO2 layer was fabricated to enhance the properties of the superconductor. It was also shown that controlling the current may provide preferential orientation.

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“…Figure 4 shows the X-ray diffraction pattern for the sintered sample, which presents the characteristic peaks and intensity relations of the YBCO-123 superconducting phase, with lattice parameters a = (3.824829 ± 0.000863)Å, b = (3.883515 ± 0.001103)Å and c = (11.688500 ± 0.002617)Å, as determined by Rietveld refinement. Small peaks from other non-superconducting phases in the material are also shown [41,42]. Figure 5 shows the X-ray Rietveld refinement.…”

Section: Resultsmentioning

confidence: 97%

Attraction and repulsion forces in melt-textured and sintered YBCO-superconductors: a comparative study

Arias-Arana

Rojas-Zambrano

Mariño-Camargo

2020

redin

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In this paper, we measure the attraction (suspension) and repulsion (levitation) forces produced by the interaction between a permanent magnet and different bulk superconductors. The measurements of the interaction force HTS-PM were carried out with a relatively simple technique developed by us, which is reproducible, reliable and low cost. The obtained results were analyzed with the Bean’s critical-state model assuming a uniform magnetic field applied to the superconductor. Two superconducting samples of YBa2Cu3O7-δ (YBCO) prepared by solid-state reaction method and by the melt-textured growth method (MTG) were used. Both samples presented a different hysteresis behaviour in the field cooling (FC) and zero field cooling (ZFC) regimes. Levitation and suspension phenomena were observed in the MTG sample; however, the sintered sample (S) with Oxygen deficiencies (δ > 0.15) displayed a slight levitation force but did not show a suspension force, the latter one attributed to a more efficient magnetic flux pinning. Additionally, the critical current density of both samples was determined from the maximum gap of the force (ΔF) in the FC regime. The obtained values were between 43.00 A/cm2 and 2,758 A/cm2 for the sintered and MTG samples, respectively. These values show a remarkable difference between sintered and MTG samples like that observed from magnetization measurements, which indicate that attraction and repulsion force measurements could provide a rapid and reliable characterization method of polycrystalline superconducting samples.

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Strongly enhanced pinning force density in YBCO–BaTiO3 nanocomposite superconductor

Cited by 47 publications

References 13 publications

Superconductive REBCO Thin Films and Their Nanocomposites: The Role of Rare-Earth Oxides in Promoting Sustainable Energy

Superconductive REBCO Thin Films and Their Nanocomposites: The Role of Rare-Earth Oxides in Promoting Sustainable Energy

Research of YBCO Superconductor Coating on Austenitic Stainless Steel by Electrophoretic Deposition

Attraction and repulsion forces in melt-textured and sintered YBCO-superconductors: a comparative study

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