Fluxoid dynamics in superconducting thin film rings

Abstract

We have measured the dynamics of individual magnetic fluxoids entering and leaving photolithographically patterned thin film rings of the underdoped high-temperature superconductor Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$, 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.

arXiv comment9 pages, 10 figures, fixed typos

References in corpus (9)

• Coupling of two superconductors through a ferromagnet : evidence for a pi-junction
• Cosmological Experiments in Condensed Matter Systems
• Ising models of quantum frustration
• Fractionalization in the cuprates: Detecting the topological order
• Search for Spontaneous Nucleation of Magnetic Flux During Rapid Cooling of YBCO films Through Tc
• Testing the Kibble-Zurek Scenario with Annular Josephson Tunnel Junctions
• Evidence for Thermally Activated Spontaneous Fluxoid Formation in Superconducting Thin-Film Rings
• Critical currents, flux-creep activation energy and potential barriers for the vortex motion from the flux creep experiments
• On Effect of Equilibrium Fluctuations on Superfluid Density in Layered Superconductors

Cited by in corpus (19)

• Fundamental studies of superconductors using scanning magnetic imaging
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• Large Magnetoresistance Oscillations in Mesoscopic Superconductors Due to Current-Excited Moving Vortices
• Superconducting thin rings with finite penetration depth
• Properties of mesoscopic superconducting thin-film rings. London approach
• A two-coil mutual inductance technique to study matching effect in disordered NbN thin films
• Effects of thermal fluctuations on the magnetic behavior of mesoscopic superconductors
• Reversible ratchet effects in a narrow superconducting ring
• Thermal suppression of surface barrier in ultrasmall superconducting structures
• Imaging phase slip dynamics in micron-size superconducting rings
• Dynamic transition from Mott-like to metal-like state of the vortex lattice in a superconducting film with a periodic array of holes
• Fluxoid fluctuations in mesoscopic superconducting rings
• Local view of superconducting fluctuations
• Anomalous oscillatory magnetoresistance in superconducting transitions
• Geometry-induced localization of thermal fluctuations in ultrathin superconducting structures
• Finite-size effect of critical penetration of Pearl vortices in narrow superconducting flat rings
• Phase slip statistics of a single isolated flux-biased superconducting ring
• Finding the boson-number distributions in superconductors from photon spectra emitted by supercurrent-carrying rings irradiated with far IR fields
• Vortex-driven periodic and aperiodic magnetoresistance oscillations in cuprates