Which mechanism impedes the zero resistance state of a superconducting electromagnet coil under high external magnetic fields?

💡 Explanation

High magnetic fields can overcome the inherent flux pinning of the superconductor itself due to defects acting as pinning centers; because flux motion generates resistance within the material, the superconductivity is lost. Therefore flux pinning destabilization, rather than increasing phonon scattering, impedes efficient superconducting coil operation.

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