Dynamic Behavior of Vortices under Applied Current Drive in Mesoscopic Superconducting Strip with Two Magnetic Dots |
| Lin Penga, Yajing Wanga, Yufeng Zhanga, Jianming Xub, Lina Sangc
aDepartment of Physics, Shanghai University of Electric Power, Shanghai 201300, China bShanghai Institute of Space Power-Sources, Shanghai 200245, China cInstitute for Superconducting and Electronic Materials, Faculty of Engineering, Australian Institute for Innovative Materials, University of Wollongong, NSW 2500, Australia |
| Received: September 24, 2019; revised version November 9, 2019; in final form November 19, 2019 |
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| Using a finite element method to numerically solve the time-dependent Ginzburg-Landau equations, we study the dynamic behavior of vortices in a hybrid structure consisting of a superconducting strip with two magnetic dipoles in the presence of a external homogeneous magnetic field and an applied current drive. Time-averaged voltage-current, free energy, density of Cooper pairs, and vortex dynamics in the superconducting strip were obtained. From the obtained results, the period of free energy oscillation is observed. The period of free energy oscillation corresponds to the period of vortices variation under the applied currents drive. The obtained results give a better understanding of free energy oscillation and vortices variation in the mesoscopic superconducting strip under an applied current drive. |
DOI:10.12693/APhysPolA.137.385 topics: free energy oscillation, dynamic behavior of vortices, magnetic dipoles, the time-dependent Ginzburg-Landau equations, finite element method. |