ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The dependence of resistance on temperature has been measured for a Tl-system 2223-phase Ag-sheathed tape with Jc(Jc=1.5×104 A/cm2, 77 K, 0 T) in an applied magnetic-field range from 0 to 0.8 T. The experimental results can be explained in terms of the thermally activated flux creep model. The relationship between pinning potential U0 and the applied magnetic field H oriented parallel to and perpendicular to the tape surface is, respectively, U0(parallel)=0.12H−0.22 eV and U0⊥=0.065H−0.35 eV. The relationship between pinning potential U and T follows: U(T,H)=U0(H)(1−t) (t=T/T0,T0=141 K). When H and the measuring current I are laid in the same tape surface, the broadened resistive transition is independent of the configuration between H and I, namely, an energy dissipation is independent of a macroscopic Lorentz force. The phenomenon is accounted for according to the two-dimensional pancakelike vortex-antivortex model based on the characteristic of a stronger intrinsic plane pinning of layer superconductors. © 1995 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.358923
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