2 research outputs found
Properties of mesoscopic superconducting thin-film rings. London approach
Superconducting thin-film rings smaller than the film penetration depth (the
Pearl length) are considered. The current distribution, magnetic moment, and
thermodynamic potential for a flat, washer-shaped annular
ring in a uniform applied field perpendicular to the film are solved
analytically within the London approach for a state with winding number and
a vortex at radius between the inner and outer radii.Comment: Submitted to Phys. Rev.
Fluxoid dynamics in superconducting thin film rings
We have measured the dynamics of individual magnetic fluxoids entering and
leaving photolithographically patterned thin film rings of the underdoped
high-temperature superconductor BiSrCaCuO, using a
variable sample temperature scanning SQUID microscope. These results can be
qualitatively described using a model in which the fluxoid number changes by
thermally activated nucleation of a Pearl vortex in, and transport of the Pearl
vortex across, the ring wall.Comment: 9 pages, 10 figures, fixed typo