Samarium cobalt magnets (SmCo) are composed of samarium, cobalt and iron. They are the second most powerful rare earth magnets available today, and with high performance, lowtemperature coefficient permanent magnet , and high working temperature. SmCo magnet is widely used in motors, watch, transducers, instruments, positional detector, generators, radar communications, medical equipments, various magnetism spreading devices, magnetic processor, electrical engineering and magnetic derrick.