The composition of Neodymium Magnet by china-magnets-source-material.com

Neodymium IronBoron Magnet contains rare earth metals like neodymium (Nd), metallic element iron (Fe), non-metallic element boron (B) and little trace elements, such as dysprosium (Dy), terbium (Tb), cobalt ( Co), niobium (Nb), gallium (Ga), aluminum(Al), copper (Cu), etc. 

 

Neodymium Iron Boron Magnet is based on compound Nd2Fe14B. The molecular formula is similar with Nd2Fe14B. But the magnetic force will be very low or even no magnetic force with exact proportion of Nd2Fe14B. Only when the content of neodymium (Nd) and boron (B) in magnet is higher than nd and B in Nd2Fe14B, it can obtain better magnetic properties.