Question

How many critical fields are in a hard superconductor?

Answer 1

Superconductor:

1. A superconductor is a substance that achieves superconductivity, which is a state of matter in which there is no electrical resistance and magnetic forces cannot permeate it.
2. A superconductor's electric current can last endlessly.
3. In a superconductor, there are two critical fields.
4. Lower and upper critical fields, $H{C}_1$and $H{C}_2,$ respectively, are their two critical fields.
5. The magnetic field is essentially absent below $H{C}_1$ in Type-II superconductors.
6. They aren't entirely magnetic.
7. Two crucial magnetic fields exist there.
8. In the region between the two critical magnetic fields, these materials gradually switch from superconducting to the normal state.