Samarium Cobalt (SmCo) is a high power magnet of slightly less power than a Neodymium. The advantage with this material is its high temperature ability. These can operate at up to 250˚C.  Samariums have a slight gold tinge, and do not require coating for protection.

They are more costly than other magnets, but are essential when a high temperature, strong magnet is required. Other sizes are available on request.