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| Home > Publications database > YBa 2 Cu 3 O 7−x films with Ba 2 Y(Nb,Ta)O 6 nanoinclusions for high-field applications > print |
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| 001 | 877980 | ||
| 005 | 20210130005317.0 | ||
| 024 | 7 | _ | |a 10.1088/1361-6668/ab6ee5 |2 doi |
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| 024 | 7 | _ | |a 1361-6668 |2 ISSN |
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| 037 | _ | _ | |a FZJ-2020-02554 |
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| 082 | _ | _ | |a 530 |
| 100 | 1 | _ | |a Celentano, G. |0 0000-0001-6017-0739 |b 0 |e Corresponding author |
| 245 | _ | _ | |a YBa 2 Cu 3 O 7−x films with Ba 2 Y(Nb,Ta)O 6 nanoinclusions for high-field applications |
| 260 | _ | _ | |a Bristol |c 2020 |b IOP Publ. |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a The structural and transport properties of YBa2Cu3O7−x films grown by pulsed laser deposition with mixed 2.5 mol% Ba2YTaO6 (BYTO) and 2.5 mol% Ba2YNbO6 (BYNO) double-perovskite secondary phases are investigated in an extended film growth rate, R = 0.02–1.8 nm s−1. 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−1 to 1.2 nm s−1. This microstructure results in very efficient flux pinning at 77 K, leading to a remarkable improvement in the critical current density (Jc) behaviour, with the maximum pinning force density Fp(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 Fp is maximized varies from 1 T to 5 T, being related to the BYNTO columnar density. The film deposited when R = 0.3 nm s−1 exhibits the best performances over the whole temperature and magnetic field ranges, achieving Fp(Max) = 900 GN m−3 at 10 K and 12 T. At higher rates, R > 1.2 nm s−1, 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 Fp(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 Jc improvement at lower temperature with Fp = 700 GN m−3 at 10 K, 12 T and 900 GN m−3 at 4.2 K, 18 T. |
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| 700 | 1 | _ | |a Rizzo, F. |0 0000-0002-7710-5084 |b 1 |
| 700 | 1 | _ | |a Augieri, A. |0 0000-0002-0942-0752 |b 2 |
| 700 | 1 | _ | |a Mancini, A. |0 0000-0002-4148-1010 |b 3 |
| 700 | 1 | _ | |a Pinto, V. |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Rufoloni, A. |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Vannozzi, A. |0 0000-0003-4628-4312 |b 6 |
| 700 | 1 | _ | |a MacManus-Driscoll, J. L. |0 0000-0003-4987-6620 |b 7 |
| 700 | 1 | _ | |a Feighan, J. |0 0000-0002-5222-7034 |b 8 |
| 700 | 1 | _ | |a Kursumovic, A. |0 P:(DE-HGF)0 |b 9 |
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| 700 | 1 | _ | |a Mayer, J. |0 P:(DE-Juel1)130824 |b 11 |
| 700 | 1 | _ | |a Van Tendeloo, G. |0 P:(DE-HGF)0 |b 12 |
| 773 | _ | _ | |a 10.1088/1361-6668/ab6ee5 |g Vol. 33, no. 4, p. 044010 - |0 PERI:(DE-600)1361475-7 |n 4 |p 044010 - |t Superconductor science and technology |v 33 |y 2020 |x 1361-6668 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/877980/files/Celentano%2Bet%2Bal_2020_Supercond._Sci._Technol._10.1088_1361-6668_ab6ee5.pdf |y Published on 2020-02-20. Available in OpenAccess from 2021-02-20. |
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