Direct measurement of single fluxoid dynamics in superconducting rings

Details Direct measurement of single fluxoid dynamics in superconducting rings Direct measurement of single fluxoid dynamics in superconducting rings

2001-03-22

arxiv.org/abs/cond-mat/0103474v1

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

We have measured the dynamics of individual magnetic fluxoids entering and leaving thin film, photolithographically patterned rings of underdoped high-temperature superconductor BSCCO using a variable sample temperature scanning SQUID microscope. These measurements can be understood within a phenomenological model in which the fluxoid number changes by thermal activation of a Pearl vortex in the ring wall. We place upper limits on the "vison" binding energy in these samples from these measurements.

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