Rare Earth Magnets are the collective name for permanent magnets made from alloys containing rare-earth elements. They are the strongest permanent magnets available delivering incredible performance from small volumes. There are two types of rare earth magnets: Neodymium Magnets (NdFeB) Samarium Cobalt Magnets (SmCo) Neodymium magnets are stronger than Samarium Cobalt magnets whereas Samarium Cobalt magnets offer much higher operating temperatures and higher resistance to corrosion than Neodymium magnets.