Rare Earth Magnets

Neodymium magnets (Nd-Fe-B) are composed of neodymium,iron, boron and a few transition metals. Samarium cobalt magnets (SmCo) are composed of samarium, cobalt and iron. These rare earth magnets are extremely strong for their small size, metallic in appearance and found in such simple shapes as rings, blocks and discs. In general, the elements are melted together and milled into a power that is dry pressed to shape in the presence of a magnetic field. The material is then sintered, aged, ground to dimension, magnetism and tested. They are called “rare earth“ magnets because the elements of neodymium and samarium are classified as such in the lanthanide’s section of the periodic table of the elements.