Samarium Cobalt (SmCo) magnets, the second generation of Rare Earth magnet material, have high magnetic properties, excellent thermal stability and resistant to corrosion.
Compared with NdFeB, It needn't to be coated. It can typically be used up to 300 'C. Therefore, It is used in those fields, that applications demand resistance to wide range temperature and environments.
How ever, It is extremely brittle and the cost is relatively expensive.
Sintered SmCo magnets usually divided into SmCo5 and Sm2Co17 according to the components.
Holding systems requiring very high holding forces, high field yoke magnets, high performance stepper, DC, servo, linear, and voice coil motors, magnetic bearings, magnetic couplings, loudspeakers, Halbach arrays, headphones, microphones, magnetic separation, instrumentation, switches, relays, magnetic resonance, sputtering, vacuum deposition, charged particle beam guidance, particle accelerators, Undulators, Wigglers, and others.
SmCo magnets have following applications: