Magnetic relaxation in the vicinity of second magnetization peak in BSCCO crystals

We have used Hall array and magneto-optic techniques for the investigation of magnetic relaxation in clean Bi 2Sr 2CaCu 2O 8 (BSCCO) crystals. The enhancement of the bulk critical current seen as a second peak in the magnetization curves is identified with the discontinuous change of the flux creep...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2000, Vol.332 (1), p.219-224
Main Authors: Konczykowski, M, Colson, S, van der Beek, C.J, Indenbom, M.V, Kes, P.H, Zeldov, E
Format: Article
Language:English
Subjects:
BSCCO
Condensed Matter
Magnetic relaxation
Physics
Second magnetization peak
Superconductivity
Vortex matter phases
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Summary:We have used Hall array and magneto-optic techniques for the investigation of magnetic relaxation in clean Bi 2Sr 2CaCu 2O 8 (BSCCO) crystals. The enhancement of the bulk critical current seen as a second peak in the magnetization curves is identified with the discontinuous change of the flux creep energy barrier vs. current relation. We propose a consistent interpretation of the hysteretic magnetization and its relaxation in clean BSCCO crystals, based on the presence of two distinct vortex matter phases, manifesting different electrodynamics. Special attention will be given to the motion of the interface between those phases across the sample.
ISSN:0921-4534
1873-2143
DOI:10.1016/S0921-4534(99)00675-9