Determination of critical current density from arbitrary flux relaxation process

Details Determination of critical current density from arbitrary flux relaxation process Determination of critical current density from arbitrary flux relaxation process

2011-01-03

arxiv.org/abs/1101.0442v3

AIP Advances 2, 012125 (2012)

Physics

Condensed Matter

Superconductivity

5 pages

Scientific paper

10.1063/1.3681281

The current-carrying ability of a type-II superconductor is generally represented by its critical current density. This can be determined by measuring a flux relaxation process starting with a testing current density that is greater than or equal to the critical value. Here we show that a flux relaxation process starting with an intermediate current density can be converted into a process starting with the critical current density by introducing a virtual time interval. Therefore, one may calculate the critical current density from the flux relaxation process starting with a current density below the critical value. The exact solutions of the time dependence of current density in the flux relaxation process were also discussed.

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