The Meissner influence demonstrated by levitating a magnet over a cuprate superconductor, that is cooled by liquid nitrogen Under some conditions, which include exceptionally very low temperatures, some ceramics exhibit high-temperature superconductivity (in superconductivity, "high temperature" indicates higher than thirty K). The main reason for this is not comprehended, but https://rnabeads32850.national-wiki.com/2045194/the_boron_nitride_uk_diaries