Samarium cobalt magnet is a type of rare-earth magnet mainly composed of samarium–cobalt alloys. A SmCo magnet may have a magnetic strength comparable to that of a NdFeB magnet but is higher in temperature rating and coercivity. SmCo magnets are available in two series defined by the ratio of Samarium to Cobalt: Series1-5 (SmCo5) and Series 2-17 (Sm2Co17). And there are currently in the magnet market