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Limits on the critical current of BSCCO/Ag conductors

Cuthbert, M.N.
Thomas, J.
Johnston, M.D.
Liu, H.K.
Dou, S.X.
Kessler, J.
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Published in 2nd European Conference on Applied Superconductivity (EUCAS 1995). Edinburgh - 3-6 July - . 1995
Collection Institute of Physics Conference Series; 148
Abstract We present an overview of the current limiting factors in BSCCO/Ag 2212 and 2223 conductors, based on a variety of transport and magnetisation experiments and consistent over a wide range of samples of different quality and origin We show how the dominant dissipation process determining the overall critical current density depends on the temperature and the applied magnetic field At low fields and temperatures weak links limit the current, while at higher field or temperature the useful current is carried only by strong paths and is limited by intragranular flux motion. While the effective cross section of these strong paths - and therefore the critical current - is strongly sample-dependent and determined by microstructural features, the flux motion in these conductors is remarkably similar from sample to sample.
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DHALLE, Marc et al. Limits on the critical current of BSCCO/Ag conductors. In: 2nd European Conference on Applied Superconductivity (EUCAS 1995). Edinburgh. [s.l.] : [s.n.], 1995. (Institute of Physics Conference Series; 148) https://archive-ouverte.unige.ch/unige:92179

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