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Title: Microstructure dependence of the c-axis critical current density in second-generation YBCO tapes.

Abstract

C-axis current flow in high temperature superconductor (HTS) tape-shaped wires arises in configurations where the local wire axis is not perpendicular to the local magnetic field, such as in power cables with helically wound HTS tapes. The c-axis critical current density J{sub c}{sup c} has been recently found to be orders of magnitude lower than the ab-plane critical current density J{sub c}{sup ab}. Here we report on J{sub c}{sup c} (77 K, sf) values of various YBa{sub 2}Cu{sub 3}O{sub 7}-based (YBCO) tapes with different microstructures. Our results show that the value of J{sub c}{sup c} (77 K, sf) decreases significantly with increasing concentration of ab-plane stacking faults in YBCO thin films and that the critical current anisotropy {gamma} = J{sub c}{sup ab}/J{sub c}{sup c} can reach values as high as 2070, implying that in the highest-anisotropy tape, {approx}20% of the tape width carries c-axis current in a helically wound power cable.

Authors:
; ; ; ; ; ; ;  [1];  [2];  [2];  [2]
  1. (Materials Science Division)
  2. (
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); ENERGY FRONTIER RESEARCH CENTER - CENTER FOR EMERG
OSTI Identifier:
1033871
Report Number(s):
ANL/MSD/JA-71891
Journal ID: ISSN 0021-8979; JAPIAU; TRN: US201203%%149
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 110; Journal Issue: 8; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
ENGLISH
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; CABLES; CRITICAL CURRENT; MAGNETIC FIELDS; MICROSTRUCTURE; STACKING FAULTS; SUPERCONDUCTORS; THIN FILMS

Citation Formats

Jia, Y., Welp, U., Crabtree, G. W., Kwok, W. K., Malozemoff, A. P., Rupich, M. W., Fleshler, S., Clem, J. R., American Superconductor Corp.), Ames Lab.), and Iowa State Univ.). Microstructure dependence of the c-axis critical current density in second-generation YBCO tapes.. United States: N. p., 2011. Web. doi:10.1063/1.3653292.
Jia, Y., Welp, U., Crabtree, G. W., Kwok, W. K., Malozemoff, A. P., Rupich, M. W., Fleshler, S., Clem, J. R., American Superconductor Corp.), Ames Lab.), & Iowa State Univ.). Microstructure dependence of the c-axis critical current density in second-generation YBCO tapes.. United States. doi:10.1063/1.3653292.
Jia, Y., Welp, U., Crabtree, G. W., Kwok, W. K., Malozemoff, A. P., Rupich, M. W., Fleshler, S., Clem, J. R., American Superconductor Corp.), Ames Lab.), and Iowa State Univ.). Sat . "Microstructure dependence of the c-axis critical current density in second-generation YBCO tapes.". United States. doi:10.1063/1.3653292.
@article{osti_1033871,
title = {Microstructure dependence of the c-axis critical current density in second-generation YBCO tapes.},
author = {Jia, Y. and Welp, U. and Crabtree, G. W. and Kwok, W. K. and Malozemoff, A. P. and Rupich, M. W. and Fleshler, S. and Clem, J. R. and American Superconductor Corp.) and Ames Lab.) and Iowa State Univ.)},
abstractNote = {C-axis current flow in high temperature superconductor (HTS) tape-shaped wires arises in configurations where the local wire axis is not perpendicular to the local magnetic field, such as in power cables with helically wound HTS tapes. The c-axis critical current density J{sub c}{sup c} has been recently found to be orders of magnitude lower than the ab-plane critical current density J{sub c}{sup ab}. Here we report on J{sub c}{sup c} (77 K, sf) values of various YBa{sub 2}Cu{sub 3}O{sub 7}-based (YBCO) tapes with different microstructures. Our results show that the value of J{sub c}{sup c} (77 K, sf) decreases significantly with increasing concentration of ab-plane stacking faults in YBCO thin films and that the critical current anisotropy {gamma} = J{sub c}{sup ab}/J{sub c}{sup c} can reach values as high as 2070, implying that in the highest-anisotropy tape, {approx}20% of the tape width carries c-axis current in a helically wound power cable.},
doi = {10.1063/1.3653292},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 8,
volume = 110,
place = {United States},
year = {2011},
month = {10}
}