A samarium–cobalt (SmCo) magnet, a type of rare earth magnet, is a
strong permanent magnet made of an alloy of samarium and
cobalt.They are generally ranked similarly in strength to neodymium
magnets, but have higher temperature ratings and higher coercivity.
They are brittle, and prone to cracking and chipping.
Samarium Cobalt permanent magnet is widely used second generation
high energy material. Using Samarium and Cobalt as its rare earth
element, it exhibits high magnetic performance characteristics in
energy product and coercive force. There are two compositions of
magnets in this family: Sm1Co5 and Sm2Co17. The highest
commercially available energy products of Sm2Co17 are in the 30MGOe