
Samarium–cobalt magnet
A samarium–cobalt (SmCo) magnet, a type of rareearth magnet, is a strong permanent magnet made of two basic elements samarium and cobalt.. They were developed in the early 1960s based on work done by Karl Strnat at WrightPatterson Air Force Base and Alden Ray at the University of particular, Strnat and Ray developed the first formulation of SmCo 5.