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← ScienceWhich outcome occurs when exceeding the critical current density in type-II superconductor crystal?
A)Abrikosov vortices become increasingly mobile✓
B)Perfect diamagnetism fully restores
C)Coherence length instantaneously vanishes
D)Crystal lattice rigidly locks in place
💡 Explanation
Exceeding critical current forces magnetic flux penetration; the Abrikosoc vortices increasingly move because of Lorentz force overcoming pinning, therefore resistance emerges rather than perfect conductivity; pinning remains strong at lower currents.
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