Explanation
Under a certain temperature and magnetic field, the minimum current required to destroy the superconductor's electrical property is the critical current of the superconductor. At this time, the current density existing on the superconductor is called the critical current density of the superconductor. It is generally considered that the destruction of superconductivity by current is caused by the magnetic field generated by current on the surface of superconductor exceeding the critical magnetic field of superconductor at any point.
Classification
Special functional materials -> Superconducting materials -> Superconducting parameters