Formation and Annihilation of Vortex-Antivortex Pairs by Magnetic Dipoles in a Mesoscopic Superconducting Film |
| L. Penga, Y. Wanga, J. Xub, Y. Zhanga, L. Zhoub, Y. Zhua, C. Caic
aDepartment of Physics, Shanghai University of Electric Power, Shanghai 201300, China bShanghai Institute of Space Power-Sources, Shanghai 200245, China cShanghai Key Laboratory of High Temperature Superconductors, Physics Department, Shanghai University, 99 Shangda Road, Shanghai 200444, China |
| Received: July 31, 2019; revised version August 22, 2019; in final form September 5, 2019 |
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| Using a finite element method to numerically solve the time-dependent Ginzburg-Landau equations, we study the vortex-antivortex dynamics in a hybrid structure consisting of a finite size superconducting film with two magnetic dipoles on top which generate vortices and antivortices in the presence of a external homogeneous magnetic field. We obtain the different vortex-antivortex patterns for different arrangement and magnetic moments of two magnetic dipoles. Our results provide a tool for an effective manipulation of magnetic flux in mesoscopic hybrid structures. |
DOI:10.12693/APhysPolA.136.962 topics: vortices and antivortices, magnetic dipoles, The time-dependent Ginzburg-Landau equations, finite element method |