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← ScienceWhich mechanism limits current density in Type-II superconductors?
A)Flux pinning prevents Abrikosov vortex motion.✓
B)Thermal runaway destroys Cooper pairs.
C)Meissner effect expels magnetic fields.
D)Energy dissipation raises material temperature.
💡 Explanation
Flux pinning prevents Abrikosov vortices induced by high magnetic fields from moving, thereby limiting energy dissipation. This increase in dissipation would otherwise lead to losses, therefore flux pinning enables higher critical current densities, rather than other dissipation methods.
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