Double disordered (DD) HTS layers processed via high-fluence PLD with modulated pressure and barium zirconate precipitation yield very high engineering current densities, above 900 and 600 A/mm2 at 18 and 31 T, respectively, measured at 4.2 K and B||c. Tape architecture is based on 50-100-μm-thick polished stainless steel tape which prior to DD-HTS deposition was coated with YSZ template yielding a biaxial in-plane texture with FWHM = 10-11° characterized using phi-scan XRD technique. High-resolution nanostructural analysis indicated a number of nonusual features in DD YBCO layers regarding "firework"-like orientation of nanoprecipitations/nanochains. These new features result in a very high concentration of local defects which reduce the critical current (Ic) measured at 77 K, self-field to about 30% of the corresponding Ic in non-DD YBCO, and simultaneously lead to substantial gaining of Ic at high fields. The main result is a substantial improvement of Ic and engineering current density (Je) achieved at high field and liquid Helium temperature in long length, large area tapes with 4 and 12 mm width. Je above 970 A/mm2 at 4.2 K, B = 18 T, B||c was achieved in 12-mm-wide tape.

Double-Disordered HTS-Coated Conductors and Their Assemblies Aimed for Ultra-High Fields: Large Area Tapes / A. Usoskin, U. Betz, F. Hofacker, A. Rutt, K. Schlenga, B. Prause, L. Rossi, L. Bottura, A. Ballarino, C. Senatore, A. Kario, W. Goldacker, A. Meledin, D. Abraimov, D. Larbalestier. - In: IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY. - ISSN 1051-8223. - 28:4(2018), pp. 8279478.1-8279478.6. [10.1109/TASC.2018.2801348]

Double-Disordered HTS-Coated Conductors and Their Assemblies Aimed for Ultra-High Fields: Large Area Tapes

L. Rossi;
2018

Abstract

Double disordered (DD) HTS layers processed via high-fluence PLD with modulated pressure and barium zirconate precipitation yield very high engineering current densities, above 900 and 600 A/mm2 at 18 and 31 T, respectively, measured at 4.2 K and B||c. Tape architecture is based on 50-100-μm-thick polished stainless steel tape which prior to DD-HTS deposition was coated with YSZ template yielding a biaxial in-plane texture with FWHM = 10-11° characterized using phi-scan XRD technique. High-resolution nanostructural analysis indicated a number of nonusual features in DD YBCO layers regarding "firework"-like orientation of nanoprecipitations/nanochains. These new features result in a very high concentration of local defects which reduce the critical current (Ic) measured at 77 K, self-field to about 30% of the corresponding Ic in non-DD YBCO, and simultaneously lead to substantial gaining of Ic at high fields. The main result is a substantial improvement of Ic and engineering current density (Je) achieved at high field and liquid Helium temperature in long length, large area tapes with 4 and 12 mm width. Je above 970 A/mm2 at 4.2 K, B = 18 T, B||c was achieved in 12-mm-wide tape.
doping; epitaxial growth; High-temperature superconductors; laser ablation; superconducting materials; superconducting tapes; yttrium compounds; Electronic, Optical and Magnetic Materials; Condensed Matter Physics; Electrical and Electronic Engineering
Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/621000
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