The Meissner result shown by levitating a magnet over a cuprate superconductor, which happens to be cooled by liquid nitrogen Beneath some disorders, for example extremely minimal temperatures, some ceramics show high-temperature superconductivity (in superconductivity, "high temperature" means previously mentioned 30 K). The rationale for this is not understood, but https://josuemnnli.wikimeglio.com/10352757/what_are_the_properties_of_ceramics_things_to_know_before_you_buy