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题名: Mechanisms of Vortex Pinning by Graded Triangular Arrays of Submicrometric Defects in a Superconducting Nb Film
作者: Wu, T. C.;Horng, Lance;Wu, Jong-Ching;Kolacek, J.;Hsio, C. W.;Yang, T. J.
贡献者: 物理學系
日期: 2005
上传时间: 2014-07-01T08:04:37Z
出版者: American Physical Society
摘要: We have investigated the periodic pinning of magnetic flux quanta in the Nb films with graded triangular arrays of submicrometer defects. Arrays of pinning centers with a spacing of about 425nm to 375 nm and a diameter of about 250nm were fabricated by the electron beam lithography. In the mixed states, the minima of magnetoresistance and maxima of critical current as a function of magnetic field appear at certain values of magnetic field corresponding to the flux quanta calculation of the lattice spacing of the homogenous ones (400nm). A comparison of will be discussed graded and homogenous triangular arrays.
關聯: Bulletin of the American Physical Society, 2005 APS March Meeting, 50: 206
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