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Title: High critical currents in heavily doped (Gd,Y)Ba2Cu3Ox superconductor tapes

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4906205· OSTI ID:1221724
 [1];  [1];  [1];  [1];  [1];  [2]
  1. Univ. of Houston, Houston, TX (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

REBa2Cu3Ox superconductor tapes with moderate levels of dopants have been optimized for high critical current density in low magnetic fields at 77 K, but they do not exhibit exemplary performance in conditions of interest for practical applications, i.e., temperatures less than 50 K and fields of 2–30 T. Heavy doping of REBCO tapes has been avoided by researchers thus far due to deterioration in properties. Here, we report achievement of critical current densities (Jc) above 20 MA/cm2 at 30 K, 3 T in heavily doped (25 mol. % Zr-added) (Gd,Y)Ba2Cu3Ox superconductor tapes, which is more than three times higher than the Jc typically obtained in moderately doped tapes. Pinning force levels above 1000 GN/m3 have also been attained at 20 K. A composition map of lift factor in Jc (ratio of Jc at 30 K, 3 T to the Jc at 77 K, 0 T) has been developed which reveals the optimum film composition to obtain lift factors above six, which is thrice the typical value. A highly c-axis aligned BaZrO3 (BZO) nanocolumn defect density of nearly 7 × 1011 cm–2 as well as 2–3nm sized particles rich in Cu and Zr have been found in the high Jc films.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Grant/Contract Number:
N00014-14-1-0182; AR0000196
OSTI ID:
1221724
Alternate ID(s):
OSTI ID: 1226696
Journal Information:
Applied Physics Letters, Vol. 106, Issue 3; Conference: San Jose, California United States, 8-13 June 2014; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 90 works
Citation information provided by
Web of Science

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Device Fabrication Based on Oxidative Chemical Vapor Deposition (oCVD) Synthesis of Conducting Polymers and Related Conjugated Organic Materials journal November 2018
The Quest for High Critical Current in Applied High-Temperature Superconductors journal September 2019
Pushing the limits of applicability of REBCO coated conductor films through fine chemical tuning and nanoengineering of inclusions journal January 2018
Rapid doubling of the critical current of YBa2Cu3O7−δ coated conductors for viable high-speed industrial processing journal November 2015
Improvement in Jc performance below liquid nitrogen temperature for SmBa2Cu3Oy superconducting films with BaHfO3 nano-rods controlled by low-temperature growth journal January 2016
Vortices in high-performance high-temperature superconductors journal September 2016
Interactive modeling-synthesis-characterization approach towards controllable in situ self-assembly of artificial pinning centers in RE-123 films journal September 2017
Materials design for artificial pinning centres in superconductor PLD coated conductors journal November 2017
The effect of fast neutron irradiation on the superconducting properties of REBCO coated conductors with and without artificial pinning centers journal March 2018
Superior critical current of Symmetric Tape Round (STAR) REBCO wires in ultra-high background fields up to 31.2 T journal November 2018
Observation of inhomogeneous depinning in YBa 2 Cu 3 O 7 composite multilayers journal June 2019
Analysis of critical current anisotropy in commercial coated conductors in terms of the maximum entropy approach journal July 2019
Next-generation highly flexible round REBCO STAR wires with over 580 A mm −2 at 4.2 K, 20 T for future compact magnets journal August 2019
Manipulation of screening currents in an (RE)Ba 2 Cu 3 O 7− x superconducting magnet journal November 2018
Superconductive REBCO Thin Films and Their Nanocomposites: The Role of Rare-Earth Oxides in Promoting Sustainable Energy journal June 2019
CSD-Grown Y1−xGdxBa2Cu3O7−δ-BaHfO3 Nanocomposite Films on Ni5W and IBAD Technical Substrates journal December 2019
Materials design for artificial pinning centres in Superconductor PLD Coated Conductors text January 2017
CSD-Grown Yv₁₋ₓGdₓBa₂Cu₃O₇₋δ-BaHfO₃ Nanocomposite Films on Ni5W and IBAD Technical Substrates text January 2020
The quest for high critical current in applied high-temperature superconductors text January 2019