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題名: Properties of Vortex Propagation in a Niobium Film with Spacing-graded Density of Pinning Sites
作者: Horng, Lance;Wu, T. C.;Wu, J. C.;Cao, R.;Yang, T. J.
貢獻者: 物理學系
日期: 2007
上傳時間: 2013-02-05T02:19:50Z
出版者: American Institute of Physics
摘要: The vortex propagation has been investigated in Nb superconductors with one dimension spacing-graded density of submicrometer-scaled holes in this research. A rectification effect can be discerned because the applied ac is transformed into a net dc voltage. These results demonstrate that the rectification is mainly characterized by the asymmetric pinning landscape and the rectified voltage depends considerably on temperature and the amplitude of applied ac. The dc voltage increases steeply up to the maximum value and then decreases to zero dc voltage with the increase of ac. The shape of peaks in the dc voltage signal become steeper and move to higher applied ac regime with the decrease of temperature.
關聯: J. Appl. Phys., 101(9): 09G113
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