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Monocore-like behavior on the global scale

Magneto-optical study of multifilament Bi-2223 tapes in current-carrying state: Behavior of individual filaments D. V. Shantsev, T. H. Johansen, Y. M. Galperin, M. Bazilievich, A. V. Bobyl, M. E. Gaevski University of Oslo, Norway & Ioffe Institute, Russia.

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Monocore-like behavior on the global scale

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  1. Magneto-optical study of multifilament Bi-2223 tapes in current-carrying state:Behavior of individual filamentsD. V. Shantsev, T. H. Johansen, Y. M. Galperin, M. Bazilievich,A. V. Bobyl, M. E. GaevskiUniversity of Oslo, Norway & Ioffe Institute, Russia Monocore-likebehavior on the global scale • Object:multifilament Bi-2223 tape for power applications • Method:magneto-optical imaging • Conditions:applied field, transport current, field+current • Approach:the critical-state model Filament scale: a fine structure of B-distributions Flux creep effects: relaxation during current pulse

  2. Temperature dependence of filament couling in multifilament Bi-2223 tapes: Magneto-optical studyD. V. Shantsev, T. H. Johansen, Y. M. Galperin, M. Bazilievich,A. V. Bobyl, M. E. GaevskiUniversity of Oslo, Norway & Ioffe Institute, Russia • Sample: multifilament Bi-2223 tape for power applications • Conditions: remanent state after large magnetic field • Method: magneto-optical imaging • Effect: coupling between filaments • Model: based on the critical-state approach • Results: relative contributions of the intra- and inter-filament currents in the whole temperature range

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