Fluxoid dynamics in superconducting thin film rings

(2) Ames Laboratory; (3) U. Paris; C.C. Tsuei (1); H. Raffy (3); J.R. Clem (2); J.R. Kirtley (1); Sud); V.G. Kogan (2); Z.Z. Li (3) ((1) IBM Research

arxiv: cond-mat/0302415 · v2 · submitted 2003-02-20 · ❄️ cond-mat.supr-con

Fluxoid dynamics in superconducting thin film rings

J.R. Kirtley (1) , C.C. Tsuei (1) , V.G. Kogan (2) , J.R. Clem (2) , H. Raffy (3) , Z.Z. Li (3) ((1) IBM Research , (2) Ames Laboratory , (3) U. Paris

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keywords dynamicsfilmfluxoidpearlringsthinvortexacross

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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.

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Fluxoid dynamics in superconducting thin film rings

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