The pinning force density, F p , of a new type of Nb artificial pin was observed in Nb-46.5 wt.% Ti superconducting wires, where the artificial pins were made of thin Nb plates inserted into successive NbTi plates and were cold drawn to a ribbon-like shape. It is shown that the position of the peak of F p shifts systematically from the low magnetic field side to the high-field side as the reduction rate of pin thickness increases. The flux pinning mechanism of the pins is also discussed.
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Matsumoto et al. (1992) studied this question.
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