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

Abstract

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.

Authors:
 [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)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1221724
Alternate Identifier(s):
OSTI ID: 1226696
Grant/Contract Number:  
N00014-14-1-0182; AR0000196
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 106; Journal Issue: 3; Conference: San Jose, California United States, 8-13 June 2014; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; copper; critical currents; metallic thin films; superconducting thin films; superconductors

Citation Formats

Selvamanickam, V., Gharahcheshmeh, M. Heydari, Xu, A., Galstyan, E., Delgado, L., and Cantoni, C. High critical currents in heavily doped (Gd,Y)Ba2Cu3Ox superconductor tapes. United States: N. p., 2015. Web. doi:10.1063/1.4906205.
Selvamanickam, V., Gharahcheshmeh, M. Heydari, Xu, A., Galstyan, E., Delgado, L., & Cantoni, C. High critical currents in heavily doped (Gd,Y)Ba2Cu3Ox superconductor tapes. United States. https://doi.org/10.1063/1.4906205
Selvamanickam, V., Gharahcheshmeh, M. Heydari, Xu, A., Galstyan, E., Delgado, L., and Cantoni, C. Tue . "High critical currents in heavily doped (Gd,Y)Ba2Cu3Ox superconductor tapes". United States. https://doi.org/10.1063/1.4906205. https://www.osti.gov/servlets/purl/1221724.
@article{osti_1221724,
title = {High critical currents in heavily doped (Gd,Y)Ba2Cu3Ox superconductor tapes},
author = {Selvamanickam, V. and Gharahcheshmeh, M. Heydari and Xu, A. and Galstyan, E. and Delgado, L. and Cantoni, C.},
abstractNote = {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.},
doi = {10.1063/1.4906205},
journal = {Applied Physics Letters},
number = 3,
volume = 106,
place = {United States},
year = {Tue Jan 20 00:00:00 EST 2015},
month = {Tue Jan 20 00:00:00 EST 2015}
}

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