Fluxoid dynamics in superconducting thin film rings

B.S. Deaver; C. C. Tsuei; C.C. Tsuei; C.C. Tsuei; D. Davidovic̀; D. Davidovic̀; D.A. Bonn; D.J. Van Harlingen; D.Yu. Vodolazov; E. Kavoussanaki; G. Aeppli; G. Blatter; H. Hilgenkamp; H. Raffy; H.J.H. Smilde; H.J.H. Smilde; I.L. Landau; J. Pearl; J. R. Clem; J. R. Kirtley; J.C. Wynn; J.R. Kirtley; J.R. Kirtley; K. Semba; L.N. Bulaevski; M. Ghinovker; M. Sigrist; M.J. Ferrari; O. Waldmann; P. Chandra; P. Seidell; R. Carmi; R. Carmi; R. Doll; R. Moessner; R. Rouse; S. Machlup; S.N. Artemenko; T. Senthil; T. Watanabe; T.A. Fulton; T.W.B. Kibble; T.W.B. Kibble; V. G. Kogan; V. V Ryazanov; V. V Ryazanov; V.B. Geshkenbein; V.B. Geshkenbein; V.G. Kogan; W.H. Zurek; X. Zhang; Y.J. Uemura; Z. Konstantinovic; Z. Z. Li

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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.Comment: 9 pages, 10 figures, fixed typo

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