Stan, G.
, Field, S.
and Martinis, J.
(2004),
Critical field for complete vortex expulsion from narrow superconducting strips, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=30819
(Accessed October 18, 2025)
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Critical field for complete vortex expulsion from narrow superconducting strips
Published
Author(s)
G Stan, S. Field,
Abstract
We have measured the maximum field for which vortices are completely expelled from a thin-film superconducting strip. Niobium strips of width W were field cooled and imaged with a scanning Hallprobe microscope. Below a critical field Bm 0=W2 all flux was expelled; above this field vortices were observed with a density increasing approximately linearly with field. The small value of the critical field, which is orders of magnitude less than in the bulk, implies that superconducting devices should be designed with narrow wires to eliminate the generation of noise from vortex motion.Citation
Physical Review Letters
Volume
92
Issue
9
Pub Type
Journals
Download Paper
Keywords
critical field, noise, superconducting devices, superconductivity, vortices
Citation
Issues
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Created March 4, 2004, Updated October 12, 2021