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Title

Double-disordered HTS-coated conductors and their assemblies aimed for ultra-high fields: large area tapes

Authors
Usoskin, Alexander
Betz, Ulrich
Hofacker, Frank
Rutt, Alexander
Schlenga, Klaus
Prause, Burkhard
Rossi, Lucio
Bottura, Luca
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Published in IEEE Transactions on Applied Superconductivity. 2018, vol. 28, no. 4, p. 1-6
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.
Keywords High-temperature superconductorsSuperconductingTapesYttrium compoundsLaser ablationEpitaxial growth,DopingSuperconducting materials
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Other version: https://ieeexplore.ieee.org/document/8279478/
Structures
Research group Groupe Senatore
Projects FP7: EUCARD-2
H2020: ARIES
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USOSKIN, Alexander et al. Double-disordered HTS-coated conductors and their assemblies aimed for ultra-high fields: large area tapes. In: IEEE Transactions on Applied Superconductivity, 2018, vol. 28, n° 4, p. 1-6. https://archive-ouverte.unige.ch/unige:106293

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Deposited on : 2018-07-09

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