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- W2072187029 abstract "Effective pinning centers are required for superconducting tape conductors with high critical current density Jc. Pinning interaction between flux lines and pinning centers controls Jc of superconductors. Artificial flux pinning centers have been introduced into NbTi filaments through the drawing process to achieve high Jc. However, no artificial pinning center was introduced into high-Tc superconductors through the drawing process by reason of its brittleness, so that Jc decreases extremely by small flux penetration at 77 K. We propose a new method by microfabrication to introduce artificial pinning centers into superconductors. The groove and hole patterns with 2–4 μm periodical intervals were projected and etched on Nb films with a photolithographic technique. The magnetization curves of fabricated films with each patterns were measured with a SQUID magnetometer. The magnetizations of Nb films with the groove pattern were larger than those of Nb films with hole pattern. The elementary pinning forces and the effective pin densities were investigated for the periodic artificial pinning centers in order to estimate pinning force density and Jc of these pins." @default.
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- W2072187029 date "2003-10-01" @default.
- W2072187029 modified "2023-09-30" @default.
- W2072187029 title "Flux pinning property of artificial pinning center introduced by microfabrication" @default.
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- W2072187029 doi "https://doi.org/10.1016/s0921-4534(03)01181-x" @default.
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