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Magnetic flux distribution in polycrystalline Bi,Pb-Sr-Ca-Cu-O superconductors in a cyclic state

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5 Author(s)
Paasi, J. ; Lab. of Electr. & Magnetism, Tampere Univ. of Technol., Finland ; Polak, M. ; Lahtinen, M. ; Eriksson, J.-T.
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The authors have studied magnetic flux distribution in polycrystalline (Bi,Pb)/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10+x/ superconductors at 77 K at different stages of an external magnetic field cycle using a movable miniature Hall sensor. The measured magnetic field profiles are compared to profiles achieved by numerical field calculations. The existence of both inter- and intragranular currents causes deviations to the field profiles predicted by classical critical state models, leading to incorrect critical current density estimations, when using standard magnetization measurements.<>

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:3 ,  Issue: 1 )

Date of Publication:

March 1993

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