Samarium-Cobalt (SmCo) Magnet The initial development of rare earth magnets occurred in the 1960s in the US, utilizing the rare earth element, samarium, combined with the metallic element cobalt.

“Samarium–cobalt magnets would have been wonderful ... an intermetallic compound is a basic requirement of any rare-earth magnet. Although the intermetallic phase Nd 2 Fe 17 did form, its ...

Since their relatively recent appearance on the commercial scene, rare-earth magnets have made quite a ... the d-block metals like cobalt, nickel, and iron, and the f-block actinides lanthanides ...