NDLI: Temperature dependence of filament-coupling in Bi-2223 tapes: magneto-optical study

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Temperature dependence of filament-coupling in Bi-2223 tapes: magneto-optical study

Content Provider	Semantic Scholar
Author	Bobyl, Alexander V. Shantsev, Daniel V. Johansen, Tom Henning Baziljevich, Michael Gal’perin, Yu. M. Gaevski, Michael E.
Copyright Year	2000
Abstract	Coupling through random superconducting bridges between filaments in a multifilamentary Ag-sheathed Bi2Sr2Ca2Cu3O10+ tape has been investigated by magneto-optical imaging at temperatures from 20 K up to Tc. Magnetic flux distributions have been measured on the surface of an intact tape in the remanent state on applying a strong perpendicular magnetic field. The flux distributions observed at low temperatures reflect the arrangement of individual filaments. At high temperatures, the distribution becomes more similar to that for a uniform monocore tape, indicating that superconducting connections appear between the filaments. To discuss the relative contributions of the intra- and inter-filament currents, a simple model based on the Bean critical state was proposed and applied to analyse the temperature dependent behaviour. The inter-filament coupling, increasing with temperature, reaches at 77 K a point where the currents flowing in large inter-filament loops are roughly equal to the intra-filament currents.
Starting Page	183
Ending Page	186
Page Count	4
File Format	PDF HTM / HTML
DOI	10.1088/0953-2048/13/2/312
Alternate Webpage(s)	https://www.mn.uio.no/fysikk/english/research/groups/amks/superconductivity/files/coupling.pdf
Alternate Webpage(s)	https://doi.org/10.1088/0953-2048%2F13%2F2%2F312
Volume Number	13
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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