Engineering current density over 5 kA mm⁻² at 4.2 K, 14 T in thick film REBCO tapes

Abstract

Engineering current density over 5 kA mm −2 at 4.2 K, 14 T in thick film REBCO tapes To cite this article: Goran Majkic et al 2018 Supercond. Sci. Technol. 31 10LT01 View the article online for updates and enhancements. Related content Critical current density above 15 MA cm2 at 30 K, 3 T in 2.2 m thick heavily-doped (Gd,Y)Ba2Cu3Ox superconductor tapes V Selvamanickam, M Heydari Gharahcheshmeh, A Xu et al.-Sample and length-dependent variability of 77 and 4.2 K properties in nominally identical RE123 coated conductors L Rossi, X Hu, F Kametani et al.-Requirements to achieve high in-field critical current density at 30 K in heavilydoped (Gd,Y)Ba2Cu3Ox superconductor tapes V Selvamanickam, M Heydari Gharahcheshmeh, A Xu et al.-Recent citations Goran Majkic-Correlation of In-Field Performance of Thick REBCO Films Between 0-14 T and 4.2-77 K Goran Majkic et al-Effect of Deposition Temperature on Microstructure and Critical Current Properties of Zr-Doped GdYBCO Superconducting Tapes Made by MOCVD Ziming Fan et al

Ultrafast transient liquid assisted growth of high current density superconducting films

“…We conclude that TLAG-CSD is an ultrafast non-equilibrium and versatile process to grow epitaxial YBCO films at c axis growth rates of ∼ 100 nm s −1 from different routes. This is~10-100 times faster than most of the thin film processes presently used 8,[29][30][31][32] to grow coated conductors and it confirms fast growth rates observed in other liquid-assisted techniques, such as in REBCO single crystal growth, REBCO bulk ceramic melt-textured growth 33 or REBCO films 14 . However here, the process is not restricted to the use of an equilibrium liquid phase and we demonstrate that the transient liquid formation is compatible with high-throughput CSD film manufacturing.…”

Dipole Magnets Above 20 Tesla: Research Needs for a Path via High-Temperature Superconducting REBCO Conductors

“…On the other hand, the performance of round REBCO wires (the whole-conductor current density and total transport current capacity at a small bending radius) needs to improve. Indeed, there is significant potential to enable this improvement as evidenced by the record current density recently demonstrated in short REBCO tape samples [71]. This can also be seen in Figure 1 where we compare the current density across the whole conductor cross-sectional area.…”

“…The irreversibility field of a REBCO thin film is above 100 T with the field in parallel with the c-axis of the film between 4.2 and 20 K [36,94] (Table 1). The pinning force of laboratory REBCO tape samples has been demonstrated to be flat up to 30 T at 4.2 K so far [71,95].…”

“…The data for the commercial SPI 2 mm wide tape (30 µm thick substrate) with the magnetic field perpendicular to the tape broad surface were measured by D. Abraimov and A. Francis at ASC/NHMFL/FSU and provided by D. van der Laan and J. Weiss at ACT. The data for the REBCO tape developed by University of Houston are from [71] with the magnetic field perpendicular to the tape broad surface. The data for the CORC R wire at a bending radius of 30 mm with projected performance at 20 T are from [38].…”

“…The current can be carried by a single or multiple REBCO conductors. Understanding the impact of tensile/compressive strain on tapes with thicker REBCO layer [71] will clarify its potential for multi-tape conductors. The current density in the stabilizer will determine the time budget to detect the superconducting-to-normal transition in multi-tape conductors [158].…”