Ferromagnetic Annulus And Superconducting Vortices

Abstract

The screening currents induced in a superconducting film by a magnetic annulus whose magnetization is perpendicular to the superconductor are calculated. We show that close to the superconductor transition temperature $T_c$ particular values of the magnetization and radii of the annulus make the creation of superconducting vortices energy favorable. We also show that the magnetic annulus offers an alternative tool for vortex pinning in the superconductor. Statistical mechanical properties of this system are discussed.

4 pages, 2 figures, submitted to PRL

References in corpus (5)

• Magnetization Controlled Superconductivity in a Film with Magnetic Dots
• Interaction of Mesoscopic Magnetic Textures with Superconductors
• Vortex Structure Around a Magnetic Dot in Planar Superconductors
• Magnetism Controlled Vortex Matter
• Enhanced Pinning of Vortices in Thin Film Superconductors by Magnetic Dot Arrays

Cited by in corpus (8)

• Nucleation of superconductivity and vortex matter in superconductor - ferromagnet hybrids
• Magnetic Pinning of Vortices in a Superconducting Film: The (anti)vortex-magnetic dipole interaction energy in the London approximation
• The interaction between a superconducting vortex and an out-of-plane magnetized ferromagnetic disk: influence of the magnet geometry
• Superconducting Transition Temperature in Heterogeneous Ferromagnet-Superconductor Systems
• Symmetry Violation in a Superconducting Film with a Square Array of Ferromagnetic Dots
• Superconducting Vortices and Elliptical Ferromagnetic Textures
• Theory of pinning in a Superconducting Thin Film Pierced by a Ferromagnetic Columnar Defect
• Vortex interactions in presence of a soft magnetic film