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Superconducting properties of (Bi,Pb)2Sr2Ca2Cu3Ox tapes (1992)

Ullrich, M. ; Heinemann, K. ; Freyhardt, H. C.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 71 (1992), S. 4440-4442

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: (Bi,Pb)2Sr2Ca2Cu3Ox Ag-sheathed tapes were fabricated by the standard "powder in tube'' technique. Because of the platelike growth of the Bi HTc-phase, it is possible to texture the wires by a rolling process, which improves the mechanical density. This implies an increase of the critical current density not only in zero magnetic field, but also in all external magnetic fields. By measuring ρ(T,B) curves, we have estimated the activation energy for thermically activated flux creep, U0, to vary between 200 and 20 meV in magnetic fields between 0.005 and 10 T. These low U0 values are approximately ten times smaller than in Y1Ba2Cu3O7−δ. For the Bi 2223 tapes, a power law U0∼B−α with α=0.277±0.030 was obtained.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.350785

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