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Title: Prediction of the J C (B) Behavior of Bi-2212 Wires at High Field

Abstract

Bi-2212 wires have been produced for much of the last decade with varying architectures, powder sources and great variability of final J c(B) properties. As Bi-2212 transitions from an R&D materials development to a magnet technology, means to predictably forecast J c(B) become increasingly valuable. Here we report on characterizations of short samples having J c(15T, 4.2 K) varying from 1210 to 6560 A/mm 2, measured in fields up to 31 T, and drawn from 10 billets. Using both 4 K transport and variable temperature VSM measurements capable of probing the 20 K irreversibility field, B irr = μ 0H k, we discovered that the vortex pinning properties are very stable across these wires, which all used the same standard powder composition (Bi 2.17Sr 1.94Ca 0.89Cu 2.00O 8+x), even though it has been made by three different manufacturers over nine years. We conclude that a power-law fit J c B , where α = 0.280 (σ = 0.015), works well at 4.2 K over the field range of at least 3-30 T and that μ 0H k(20 K) remains stable at 8.6 ± 0.4 T. We conclude that the dominant current limiting mechanism predicting J c(B) in Bi-2212 is themore » effective filament connectivity. J c(B) at high fields may thus be predicted by simple I c measurements at easily accessible fields in the 3-15 T range.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
Publication Date:
Research Org.:
Florida State Univ., Tallahassee, FL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1506068
Grant/Contract Number:  
SC0010421
Resource Type:
Accepted Manuscript
Journal Name:
IEEE Transactions on Applied Superconductivity
Additional Journal Information:
Journal Volume: 29; Journal Issue: 5; Conference: Applied Superconductivity Conference, Seattle,WA (United States), 28 Oct - 02 Nov 2018; Journal ID: ISSN 1051-8223
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 43 PARTICLE ACCELERATORS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Bi-2212; critical current density; high temperature superconductor; multifilamentary wire

Citation Formats

Brown, Michael D., Jiang, Jianyi, Tarantini, Chiara, Abraimov, Dmytro, Bradford, Griffin, Jaroszynski, Jan, Hellstrom, Eric E., and Larbalestier, David C. Prediction of the J C (B) Behavior of Bi-2212 Wires at High Field. United States: N. p., 2019. Web. doi:10.1109/TASC.2019.2899226.
Brown, Michael D., Jiang, Jianyi, Tarantini, Chiara, Abraimov, Dmytro, Bradford, Griffin, Jaroszynski, Jan, Hellstrom, Eric E., & Larbalestier, David C. Prediction of the J C (B) Behavior of Bi-2212 Wires at High Field. United States. doi:10.1109/TASC.2019.2899226.
Brown, Michael D., Jiang, Jianyi, Tarantini, Chiara, Abraimov, Dmytro, Bradford, Griffin, Jaroszynski, Jan, Hellstrom, Eric E., and Larbalestier, David C. Wed . "Prediction of the J C (B) Behavior of Bi-2212 Wires at High Field". United States. doi:10.1109/TASC.2019.2899226.
@article{osti_1506068,
title = {Prediction of the J C (B) Behavior of Bi-2212 Wires at High Field},
author = {Brown, Michael D. and Jiang, Jianyi and Tarantini, Chiara and Abraimov, Dmytro and Bradford, Griffin and Jaroszynski, Jan and Hellstrom, Eric E. and Larbalestier, David C.},
abstractNote = {Bi-2212 wires have been produced for much of the last decade with varying architectures, powder sources and great variability of final Jc(B) properties. As Bi-2212 transitions from an R&D materials development to a magnet technology, means to predictably forecast Jc(B) become increasingly valuable. Here we report on characterizations of short samples having Jc(15T, 4.2 K) varying from 1210 to 6560 A/mm2, measured in fields up to 31 T, and drawn from 10 billets. Using both 4 K transport and variable temperature VSM measurements capable of probing the 20 K irreversibility field, Birr = μ0Hk, we discovered that the vortex pinning properties are very stable across these wires, which all used the same standard powder composition (Bi2.17Sr1.94Ca0.89Cu2.00O8+x), even though it has been made by three different manufacturers over nine years. We conclude that a power-law fit Jc∝B-α, where α = 0.280 (σ = 0.015), works well at 4.2 K over the field range of at least 3-30 T and that μ0Hk(20 K) remains stable at 8.6 ± 0.4 T. We conclude that the dominant current limiting mechanism predicting Jc(B) in Bi-2212 is the effective filament connectivity. Jc(B) at high fields may thus be predicted by simple Ic measurements at easily accessible fields in the 3-15 T range.},
doi = {10.1109/TASC.2019.2899226},
journal = {IEEE Transactions on Applied Superconductivity},
number = 5,
volume = 29,
place = {United States},
year = {2019},
month = {2}
}

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This content will become publicly available on February 13, 2020
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