Magnetic Flux Distribution Dynamics in Bi-2223/Ag Tapes

Jaakko Paasi, Markku Lahtinen, Jarl Thure Eriksson

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)


We have studied magnetic flux distribution dynamics in silver sheathed Bi-2223 superconducting tapes at 77 K using a novel Hall sensor technique. The flux distribution exhibits a strongly time dependent behaviour due to thermally activated flux creep in the intergranular current system. In applied constant fields the decrease of measured magnetic field profiles was due to a logarithmic relaxation in time of induced intergranular screening currents. In slowly swept AC magnetic fields the flux distribution dynamics wasgoverned by a continuous relaxation of intergranular screening currents. The screening current density was logarithmically dependent on the sweep rate of the applied field.

Original languageEnglish
Pages (from-to)1855-1858
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number4
Publication statusPublished - Jul 1994
MoE publication typeA1 Journal article-refereed


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