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Q & A: superconductor critical current density

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Most recent answer: 04/11/2011
Q:
For superconductors, maximum critical current density is when the current density is strong enough to quench the superconducting state. In high temperature superconducting films, I find the term "minimum critical current density." What is this referring to? TX
- Kirk (age 38)
charleston, il, usa
A:
I looked at one paper that used that phrase in the title. It didn't mean anything special or deep. They just were saying that the critical current divided by the total cross-sectional area of their sample was 105 A/cm2. Since they had reason to believe that the sample was inhomogeneous, that was a minimum estimate for the best part of the sample.

Mike W.

(published on 04/11/2011)

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