Electromagnetic study of superconductors, critical state model
Superconductors - Wire structure and behavior

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D2702 V1 Article

Electromagnetic study of superconductors, critical state model
Superconductors - Wire structure and behavior

Authors : Pascal TIXADOR, Yves BRUNET

Publication date: February 10, 2004 | Lire en français

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1. Electromagnetic study of superconductors, critical state model

To explain and understand the behavior of a superconducting wire, it is essential to have a macroscopic electromagnetic model. With Maxwell's equations verified, all we need are the relationships between induction ( B ) and magnetic field (H ) on the one hand, and electric field ( E ) and current density (J ) on the other.

1.1 Relation B (H )

The model we're looking for is a macroscopic one. We are therefore only interested in the average induction through the material and not in the local induction, at the microscopic level of the vortexes. The relationship between mean induction B and magnetic field H is shown in figure

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