Microscopic Analysis of Low-Frequency Flux Noise in YBa$_2$Cu$_3$O$_7$ Direct Current Superconducting Quantum Interference Devices

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dc.creatorDoenitz, D.
dc.creatorStraub, R.
dc.creatorKleiner, R.
dc.creatorKoelle, D.
dc.date2004-07-28
dc.date.accessioned2026-07-07T06:17:57Z
dc.date.available2026-07-07T06:17:57Z
dc.descriptionWe use low-temperature scanning electron microscopy combined with SQUID detection of magnetic flux to image vortices and to investigate low-frequency flux noise in YBa$_2$Cu$_3$O$_7$ thin film SQUIDs. The low-frequency flux noise shows a nonlinear increase with magnetic cooling field up to 60 $μ$T. This effect is explained by the surface potential barrier at the SQUID hole. By correlating flux noise data with the spatial distribution of vortices, we obtain information on spatial fluctuations of vortices on a microscopic scale, e.g. an average vortex hopping length of approximately 10 nm.
dc.descriptionsubmitted to Applied Physics Letters
dc.identifierhttps://arxiv.org/abs/cond-mat/0407733
dc.identifierhttp://arxiv.org/abs/cond-mat/0407733
dc.identifierAppl. Phys. Lett. 85, 5938 (2004)
dc.identifierdoi:10.1063/1.1839273
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/94569
dc.subjectSuperconductivity
dc.titleMicroscopic Analysis of Low-Frequency Flux Noise in YBa$_2$Cu$_3$O$_7$ Direct Current Superconducting Quantum Interference Devices
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