Microstructure and flux pinning in superconducting Bi-Pb-Sr-Ca-Cu-O wires

Dou, S.X.School of Materials Science and Engineering, University of New South Wales (author)

Godkänd; 1990; 20080228 (ysko)
The critical current density (Jc) of Ag-clad Bi-Pb-Sr-Ca-Cu-O wire has been measured to be 1.2×104 A/cm2 at 77 K in zero field. The high Jc is attributed to a combination of elimination of the poisoning effect of Ag on superconductivity, grain alignment, and enhancement of flux pinning. Jc-H dependence was significantly improved in the Ag-clad tape, which has a Jc of 1.0×103 A /cm2 at 77 K and 4000 Oe, while the Jc of the sintered pellet drops two orders of magnitude at only 100 Oe. A pronounced anisotropy in Jc under high magnetic field is attributed to the grain alignment. Planar defects, such as heavy stacking faults parallel to the a-b plane in the rolled tape, are considered to be effective pinning centres.

Liu, H.K.School of Materials Science and Engineering, University of New South Wales (author)
Wang, J.School of Materials Science and Engineering, University of New South Wales (author)
Apperley, M.H.School of Materials Science and Engineering, University of New South Wales (author)
Sorrell, C.C.School of Materials Science and Engineering, University of New South Wales (author)
Guo, S.J.Luleå tekniska universitet (author)
Loberg, Bengt (author)
Easterling, Kenneth E.Luleå tekniska universitet(Swepub:ltu)bib-keneas (author)
Luleå tekniska universitetSchool of Materials Science and Engineering, University of New South Wales (creator_code:org_t)

By the author/editor: Dou, S.X.; Liu, H.K.; Wang, J.; Apperley, M.H.; Sorrell, C.C.; Guo, S.J.; show more...; Loberg, Bengt; Easterling, Kenn ...; show less...

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