For sale since 1980, Samarium Cobalt was the first magnetic material to revolutionize electric motor performance.
In fact, it provides a magnetic flux around 5 times greater than traditional materials like ferrite or alnico. It does not need any protective coating since, unlike Neodymium, it does not oxidize.
Samarium Cobalt is basically made up of a lot of pure cobalt, and this is why its price is particularly high. Moreover, Samarium Cobalt is very fragile, but it has the positive characteristic of being able to resist temperatures of up to a 250° C without undergoing any significant variation in power, and it is for this reason that, many years after the advent of Neodymium, this has continued to be used.