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Title: Comparison of growth texture in round Bi2212 and flat Bi2223 wires and its relation to high critical current density development

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep08285· OSTI ID:1188408

Why Bi₂Sr₂CaCu₂Ox (Bi2212) allows high critical current density Jc in round wires rather than only in the anisotropic tape form demanded by all other high temperature superconductors is important for future magnet applications. Here we compare the local texture of state-of-the-art Bi2212 and Bi2223 ((Bi,Pb)₂Sr₂Ca₂Cu₃O₁₀), finding that round wire Bi2212 generates a dominant a-axis growth texture that also enforces a local biaxial texture (FWHM <15°) while simultaneously allowing the c-axes of its polycrystals to rotate azimuthally along and about the filament axis so as to generate macroscopically isotropic behavior. By contrast Bi2223 shows only a uniaxial (FWHM <15°) c-axis texture perpendicular to the tape plane without any in-plane texture. Consistent with these observations, a marked, field-increasing, field-decreasing Jc(H) hysteresis characteristic of weak-linked systems appears in Bi2223 but is absent in Bi2212 round wire. Growth-induced texture on cooling from the melt step of the Bi2212 Jc optimization process appears to be the key step in generating this highly desirable microstructure.

Research Organization:
Florida State Univ., Tallahassee, FL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
SC0010421
OSTI ID:
1188408
Journal Information:
Scientific Reports, Vol. 5, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 54 works
Citation information provided by
Web of Science

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Investigation of the melt-growth process of YbBa 2 Cu 3 O 7−δ powder in Ag-sheathed tapes journal January 2019
Strain induced irreversible critical current degradation in highly dense Bi-2212 round wire journal April 2015
Improvements of fabrication processes and enhancement of critical current densities in (Ba,K)Fe 2 As 2 HIP wires and tapes journal April 2018
Recent breakthrough development in iron-based superconducting wires for practical applications journal January 2019
Magnetic properties of electrospun non-woven superconducting fabrics journal March 2016
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