High-temperature superconductivity is superconductivity in materials with a critical temperature above 77 K, the boiling point of liquid nitrogen. They are "high-temperature" only relative to previous
A sample of bismuth strontium calcium copper oxide (BSCCO), which is currently one of the most practical high-temperature superconductors. Notably, it does not contain rare earths. BSCCO is a cuprate superconductor based on bismuth and strontium. Thanks to its higher operating temperature, cuprates are now becoming competitors for more ordinary niobium-based superconductors, as well as magnesium diboride superconductors.
Small magnet levitating above a high-temperature superconductor cooled by liquid nitrogen: this is a case of Meissner effect.
A room-temperature superconductor is a hypothetical material capable of displaying superconductivity above 0 °C, operating temperatures which are commonly encountered in everyday settings. As of 2023,
High-temperature superconductivity
…Onnes in 1911, in a metal solid. Ever since, researchers have attempted to create superconductivity at higher temperatures with the goal of finding a room-temperature superconductor. By the late 1970s, superconductivity was observed in several metallic compounds (in particular Nb-based, such as NbTi, Nb3Sn, and Nb3Ge) at temperatures…
A magnet levitating above a superconductor (at −200 °C) that is exhibiting the Meissner effect.