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Publication
Physical Review B - CMMP
Paper
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 Bi2Sr2CaCu2O8+δ, using a variable sample temperature scanning superconducting quantum interference device 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. © 2003 The American Physical Society.