Polymer-assisted surface decoration for critical current enhancement in YBa2Cu3O7−x films

Piperno, Laura; Armenio, A. Angrisani; Vannozzi, Angelo; Mancini, A.; Rizzo, Francesco; Augieri, A.; Pinto, Valentina; Rufoloni, A.; Mos, R.B.; Ciontea, L.; Petrişor, T.; Sotgiu, Giovanni; Celentano, G.

doi:10.1016/j.apsusc.2019.04.027

Cited by 11 publications

(11 citation statements)

References 37 publications

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“…In particular, they were observed only at the interface and never embedded in the film matrix. The presence of this feature did not produce any increase of strain or other defects, e.g., stacking faults, in its surroundings as, on the contrary, revealed in films where other NPs are at the substrate interface and strain or stacking faults are evident in the film grown around the NP. ,− …”

Section: Resultssupporting

confidence: 89%

Nanodiamond Influence on the Nucleation and Growth of YBCO Superconducting Film Deposited by Metal–Organic Decomposition

Pinto

Vannozzi

Celentano

et al. 2023

Crystal Growth & Design

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It was recently shown that the introduction of nanodiamond (ND) into a superconducting metal–organic deposited YBa2Cu3O7−δ (YBCO) film produces an increase in critical current density in self-field conditions (B = 0 T). Such improvement appears to be due to the formation of denser and smoother films than the samples deposited without ND. This paper presents the work done to understand the role of ND during YBCO nucleation and growth. A detailed study on YBCO+ND films quenched at different temperatures of the crystallization process was carried out. Results showed that the reaction responsible for YBCO production appeared effectively affected by ND. In particular, ND stabilizes one of the YBCO precursors, BaF2(1–x)O x , whose conversion into YBCO requires a prolonged time. Therefore, the YBCO nucleation is slowed down by ND and begins when the experimental conditions favor both thermodynamically and kinetically the formation of YBCO along the c-axis. This effect has important implications because the growth of a highly epitaxial c-axis YBCO film enables excellent superconducting performance.

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Section: Resultssupporting

confidence: 89%

Nanodiamond Influence on the Nucleation and Growth of YBCO Superconducting Film Deposited by Metal–Organic Decomposition

Pinto

Vannozzi

Celentano

et al. 2023

Crystal Growth & Design

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“…In such a scenario, the Lorentz force splits between the vortices and the magnetic pinning sites which results in higher current density before the vortices start depinning from the defects. The metal organic decomposition method has also been employed for decoration of the substrate surface for improving the vortex pinning properties of YBCO thin films [166][167][168].…”

Section: Substrate Surface Modificationsmentioning

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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“…Stacking faults consist of an extra Cu-O chain inserted between two Ba-O planes along the YBCO c-axis, resulting in a local variation of the stoichiometry (Y 2 Ba 4 Cu 8 O 16 , Y248 or Y124). This defect, created during the film growth stage in order to accommodate the strain along the c-axis, is promoted in extremely severe strain conditions, as in CSD YBCO with APC nanoparticles, or in pristine YBCO films close to the substrate interface region [37]. The presence of stacking faults has been reported often in previous works on YBCO with APC doping systems and BYNTO [28,30,38].…”

Section: Structural Analysesmentioning

confidence: 84%

YBa₂Cu₃O_7−x films with Ba₂Y(Nb,Ta)O₆ nanoinclusions for high-field applications

Celentano¹,

Rizzo²,

Augieri³

et al. 2020

Supercond. Sci. Technol.

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Structural and transport properties of YBa 2 Cu 3 O 7-x films grown by pulsed laser deposition with mixed 2.5 mol.% Ba 2 YTaO 6 (BYTO) and 2.5 mol.% Ba 2 YNbO 6 (BYNO) double-perovskite secondary phases are investigated in an extended film growth rate, R = 0.02 -1.8 nm/s. The effect of R on the film microstructure analyzed by TEM techniques shows an evolution from sparse and straight to denser, thinner and splayed continuous columns, with mixed BYNO+BYTO (BYNTO) composition, as R increases from 0.02 nm/s to 1.2 nm/s. This microstructure results in very efficient flux pinning at 77 K leading to a remarkable improvement of the J c behaviour, with the maximum of the pinning force density F p (Max) = 13.5 GN/m 3 and the irreversibility field in excess of 11 T. In this range, the magnetic field values at which the F p , is maximized varies from 1 T to 5 T being related to the BYNTO columnar density. The film deposited with R = 0.3 nm/s exhibits the best performances over the whole temperature and magnetic field ranges achieving F p (Max) = 900 GN/m 3 at 10 K and 12 T. At higher rates, R > 1.2 nm/s, BYNTO columns show a meandering nature and are prone to form short nanorods. In addition, in the YBCO film matrix a more disordered structure with a high density of short stacking faults is observed. From the analysis of the F p (H, T) curves it emerges that in films deposited at the high R limit, the vortex pinning is no longer dominated by BYNTO columnar defects, but by a new mechanism showing the typical temperature scaling law. Even though this microstructure produces a limited improvement at 77 K, it exhibits a strong J c improvement at lower temperature with F p = 700 GN/m 3 at 10 K, 12 T and 900 GN/m 3 at 4.2 K, 18 T.

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Polymer-assisted surface decoration for critical current enhancement in YBa2Cu3O7−x films

Cited by 11 publications

References 37 publications

Nanodiamond Influence on the Nucleation and Growth of YBCO Superconducting Film Deposited by Metal–Organic Decomposition

Nanodiamond Influence on the Nucleation and Growth of YBCO Superconducting Film Deposited by Metal–Organic Decomposition

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

YBa₂Cu₃O_7−x films with Ba₂Y(Nb,Ta)O₆ nanoinclusions for high-field applications

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Polymer-assisted surface decoration for critical current enhancement in YBa2Cu3O7−x films

Cited by 11 publications

References 37 publications

Nanodiamond Influence on the Nucleation and Growth of YBCO Superconducting Film Deposited by Metal–Organic Decomposition

Nanodiamond Influence on the Nucleation and Growth of YBCO Superconducting Film Deposited by Metal–Organic Decomposition

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

YBa2Cu3O7−x films with Ba2Y(Nb,Ta)O6 nanoinclusions for high-field applications

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Product

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YBa₂Cu₃O_7−x films with Ba₂Y(Nb,Ta)O₆ nanoinclusions for high-field applications