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Fabrication of MgB2 tapes sheathed with carbon steels by ex situ and in situ methods

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3 Author(s)
Fujii, H. ; Supercond. Mater. Center, Nat. Inst. for Mater. Sci., Ibaraki, Japan ; Togano, K. ; Kumakura, H.

MgB2 tapes sheathed with carbon steel (CS) were fabricated by a powder-in-tube technique with ex situ and in situ methods. The critical current density (Jc) value of the former tape was about 2 kA/cm2 at 4.2 K and 10 T by heat treatment at 900°C, whereas the Jc value of the latter tape reached about 3 kA/cm2 by heat treatment at temperature as low as 600°C. The Jc anisotropy with respect to field direction of the tapes fabricated by the ex situ method was much larger than that of the tapes fabricated by the in situ method.

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Applied Superconductivity, IEEE Transactions on  (Volume:13 ,  Issue: 2 )