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A nanoscale SQUID operating at high magnetic fields
journal contribution
posted on 2011-11-11, 00:00 authored by S Lam, J Clem, Wenrong YangWenrong YangA washer-free Nb nanoSQUID has been developed for measuring magnetization changes from nanoscale objects. The SQUID loop is etched into a 250 nm wide Au/Nb bilayer track and the diameter of the SQUID hole is ~ 70 nm. In the presence of a magnetic field perpendicular to the plane of the SQUID, vortex penetration into the 250 nm wide track can be observed via the critical current–applied field characteristic and the value at which vortex first penetrates is consistent with the theoretical prediction. Upon removing the applied field, the penetrated vortices escape the track and the critical current at zero field is restored.
History
Journal
NanotechnologyVolume
22Issue
45Pagination
1 - 5Publisher
Institute of Physics PublishingLocation
Bristol, EndlandISSN
0957-4484eISSN
1361-6528Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2011, IOP Publishing LtdUsage metrics
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No categories selectedKeywords
applied fieldbi-layerhigh magnetic fieldsnano scalenano-scale objectstheoretical predictionvortex penetrationzero fieldsScience & TechnologyTechnologyPhysical SciencesNanoscience & NanotechnologyMaterials Science, MultidisciplinaryPhysics, AppliedScience & Technology - Other TopicsMaterials SciencePhysicsQUANTUM INTERFERENCE DEVICEDC-SQUIDNIOBIUM
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