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Vortex Properties of Nanosized Superconducting Strips with One Central Weak Link Under an Applied Current Drive

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Abstract

The static and dynamic properties of vortices in a nanosized superconducting strip with one central weak link (weakly superconducting region or normal metal) are investigated in the presence of external magnetic and electric fields. The time-dependent Ginzburg–Landau equations are used to describe the electronic transport and have been solved numerically by a finite element analysis. Anisotropy is included through the spatially dependent anisotropy coefficient \(\zeta \) in different layers of the sample. Our results show that the energy barrier for vortices to enter a weak link is smaller than that for vortices to enter the superconducting layers. The magnetization shows periodic oscillations. With the introduction of the weak link, the period of oscillations decreases.

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Acknowledgments

This work is sponsored by the Science and Technology Commission of Shanghai Municipality (14521102800), the National Natural Science Foundation of China (51202141), the Opening Project of Shanghai Key Laboratory of High Temperature Superconductors (14DZ2260700), the Natural Science Foundation of Shanghai (No. 13ZR1417600), and the Innovation Program of Shanghai Municipal Education Commission (No. 14YZ132), .

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Authors and Affiliations

  1. Department of Physics, Shanghai University of Electric Power, Shanghai, 201300, China

    Lin Peng

  2. Shanghai Key Laboratory of High Temperature Superconductors, Physics Department, Shanghai University, 99 Shangda Road, Shanghai, 200444, China

    Lin Peng & Chuanbing Cai

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  1. Lin Peng
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  2. Chuanbing Cai
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Correspondence to Lin Peng.

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Peng, L., Cai, C. Vortex Properties of Nanosized Superconducting Strips with One Central Weak Link Under an Applied Current Drive. J Low Temp Phys 183, 371–378 (2016). https://doi.org/10.1007/s10909-016-1533-9

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  • DOI: https://doi.org/10.1007/s10909-016-1533-9

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