Back مغناطيس فائق الموصلية Arabic Imant superconductor (física) Catalan Υπεραγώγιμος μαγνήτης Greek Imán superconductor Spanish آهنربای ابررسانا Persian Supraconductivité#Électro-aimants French अतिचालक चुम्बक Hindi Magnet superkonduktor ID 超伝導電磁石 Japanese 초전도 전자석 Korean
A superconducting magnet is an electromagnet made from coils of superconducting wire. They must be cooled to cryogenic temperatures during operation. In its superconducting state the wire has no electrical resistance and therefore can conduct much larger electric currents than ordinary wire, creating intense magnetic fields. Superconducting magnets can produce stronger magnetic fields than all but the strongest non-superconducting electromagnets, and large superconducting magnets can be cheaper to operate because no energy is dissipated as heat in the windings. They are used in MRI instruments in hospitals, and in scientific equipment such as NMR spectrometers, mass spectrometers, fusion reactors and particle accelerators. They are also used for levitation, guidance and propulsion in a magnetic levitation (maglev) railway system being constructed in Japan.