A fluxoid is a quantized magnetic flux that can exist in a superconducting ring or loop, representing the fundamental unit of magnetic flux in superconductors. It arises due to the quantization of magnetic field lines in type-II superconductors, where the magnetic flux can only take discrete values that are integer multiples of a fundamental unit called the magnetic flux quantum. The existence of fluxoids is crucial for understanding phenomena such as flux pinning and vortex dynamics in superconductors.
congrats on reading the definition of Fluxoid. now let's actually learn it.