Initial dissipation and a finite-size effect in inhomogeneous superconductors: the case of BPSCCO/Ag tapes

Mladen Prester; P. Kovac; I. Husek

doi:10.1117/12.335864

22 December 1998 Initial dissipation and a finite-size effect in inhomogeneous superconductors: the case of BPSCCO/Ag tapes

Mladen Prester, P. Kovac, I. Husek

Author Affiliations +

Proceedings Volume 3481, Superconducting and Related Oxides: Physics and Nanoengineering III; (1998) https://doi.org/10.1117/12.335864
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

The onset of dissipation in thin, tape shaped form of high-T_c superconductors has been studied by the use of differential resistance characteristics in absence or in small magnetic fields. The studies reveal two characteristic currents: the onset current defining a sharp onset of dissipation and the critical current, a parameter of power-law dependencies. A broad range of intermediate currents is characterized by an anomalous saturation at the very low level of dissipation. The observations are interpreted inside the percolation model for the onset of dissipation as a crossover from the range dominated by finiteness of the sample on the scale of current-dependent correlation length to the range of power laws that corresponds to scaling regime of critical phenomena.

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Mladen Prester, P. Kovac, and I. Husek "Initial dissipation and a finite-size effect in inhomogeneous superconductors: the case of BPSCCO/Ag tapes", Proc. SPIE 3481, Superconducting and Related Oxides: Physics and Nanoengineering III, (22 December 1998); https://doi.org/10.1117/12.335864

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