Theory of pinning in a Superconducting Thin Film Pierced by a Ferromagnetic Columnar Defect
arXiv:cond-mat/0412136 · doi:10.1103/PhysRevB.71.024515
Abstract
This is an analytical study of pinning and spontaneous vortex phase is a system consisting of a superconducting thin film pierced by a long ferromagnetic columnar defect of finite radius . The magnetic fields, screening currents, energy and pinning forces for this system are calculated. The interaction between the magnetic field of vortices and the magnetization outside the plane of the film and its close proximity enhances vortex pinning significantly. Spontaneous vortex phase appears when the magnetization of the columnar defect is increased above a critical value. Transitions between phases characterized by different number of flux quanta are also studied. These results are generalized to the case when the superconductor is pierced by an array of columnar defects.
arXiv comment6 pages, 4 figures, Accepted for publication in Phys. Rev. B
References in corpus (9)
- Magnetization Controlled Superconductivity in a Film with Magnetic Dots
- Interaction of Mesoscopic Magnetic Textures with Superconductors
- The interaction between a superconducting vortex and an out-of-plane magnetized ferromagnetic disk: influence of the magnet geometry
- Vortex Structure Around a Magnetic Dot in Planar Superconductors
- Anisotropic Transport Properties of Ferromagnetic-Superconducting Bilayers
- Ferromagnetic Annulus And Superconducting Vortices
- Vortex Plasma in a Superconducting Film with Magnetic Dots
- Superconducting Vortices and Elliptical Ferromagnetic Textures
- Magnetism Controlled Vortex Matter