SmCo magnets,of  the rare earth class have been available since the early 1970's.These magnets possess very high magnetic properties ,excellent thermal stability,while  remaining resistant  to corrosion .These  characteristics make smco magnets ideal,for application requiring a resistance to wide ranging temperatures and environments
SmCo magnets are manufactured by sintering or compression bonding .They are anisotropic and can only be magnetized in the direction of orientation.In general ,magnetizing field of approximately 30 to 45koe are required to saturate SmCo magnets