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- W2029181893 abstract "The critical current density Jc is investigated as a function of both field direction and temperature in c-axis-oriented Bi2Sr2CaCu2Oχ “2212” and (Bi, Pb)2Sr2Ca2Cu3Oχ “2223” polycrystals: a screen-printed “2212” tape with Jc(77 K, 0 T) = 1.4×104A/cm2, a screen-printed “2223” tape with Jc(77 K, 0 T) = 1.5×104A/cm2 and a Ag-sheathed “2223” tape with Jc(77 K, 0 T) = 2.2×104A/cm2. The Jc versus θ data at 77 K with the angle θ between B and the c-axis show that Jc in a field is influenced only by the field component parallel to the c-axis. There is a correlation between the anisotropy ratio γ=Jc(B⊥c)/Jc(B||c) and the half-height angular width Δθ of a peak for B⊥c. An increase of B in a sample enhances γ and narrows Δθ. At fixed B, the screen-printed “2212” tape has the largest γ and the narrowest Δθ in all samples, which corresponds to the SEM result showing the highest c-axis alignment. The second highest is the screen-printed “2223” tape and the lowest is the Ag-sheathed “2223” tape. Jc in zero field increases almost linearly with decreasing temperature below 70 K, which is explained by the flux creep model." @default.
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- W2029181893 date "1993-07-01" @default.
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- W2029181893 title "Critical current density and microstructure of c-axis-oriented Bi2Sr2CaCu2Oχ and (Bi, Pb)2Sr2Ca2Cu3Oχ superconducting tapes" @default.
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- W2029181893 doi "https://doi.org/10.1016/0921-4534(93)90481-5" @default.
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