The basics
Meissner effect
A superconductor pushes magnetic fields out of itself, so a magnet floats above one. It is the definitive test: an ordinary conductor can fake zero resistance and cannot fake this.
Why meissner effect matters
It is what separates a superconductor from a very good conductor, so a measurement without it is not yet a claim of superconductivity.
Related to meissner effect
SuperMatics is a platform infrastructure company for superconducting devices: software that finds the material and the process, lab work that makes and measures it, and pilot manufacturing with industrial partners.If you have a device and a constraint it has to meet, tell us about it.