Anisotropic Transport Properties of Ferromagnetic-Superconducting Bilayers

Abstract

We study the transport properties of vortex matter in a superconducting thin film separated by a thin insulator layer from a ferromagnetic layer. We assume an alternating stripe structure for both FM and SC layers as found in [7]. We calculate the periodic pinning force in the stripe structure resulting from a highly inhomogeneous distribution of the vortices and antivortices. We show that the transport properties in FM-SC bilayer are highly anisotropic. In the absence of random pinning it displays a finite resistance for the current perpendicular to stripes and is superconducting for the current parallel to stripes. The average vortex velocity, electric field due to the vortex motion, Josephson frequency and higher harmonics of the vortex oscillatory motion are calculated.

4 pages, 2figures, Submitted to PRL

References in corpus (2)

• Magnetization Controlled Superconductivity in a Film with Magnetic Dots
• Interaction of Mesoscopic Magnetic Textures with Superconductors

Cited by in corpus (7)

• Ferromagnet-Superconductor Hybrids
• Nucleation of superconductivity and vortex matter in superconductor - ferromagnet hybrids
• Guiding superconducting vortices by magnetic domain walls
• The London Study of Vortex States in a Superconducting Film Due to a Magnetic Dot
• Enhancement of vortex pinning in superconductor/ferromagnet bilayers via angled demagnetization
• Superconducting Vortices and Elliptical Ferromagnetic Textures
• Theory of pinning in a Superconducting Thin Film Pierced by a Ferromagnetic Columnar Defect