Neodymium-Iron-Boron (NdFeB) magnets, known as the Third Generation of Rare Earth magnets, has the high remanence, high coercive force, high Maximum energy and is easily formed into various sizes and shapes. So they have been widely used in commercially available fields since the mid-1980’s. Sintered NdFeB offers the highest magnetic properties (33 MGOe to 51 MGOe).Neodymium magnets offer the best value when comparing performance, size and cost. They are moderate in price, very strong magnetically, and typically allow for dimensional reductions. They have poor resistance to corrosion and should have a coating or plating applied. Neodymium Iron Boron has good resistance to external demagnetization fields because of its high Intrinsic Coercive Force (Hci). This resistance makes Neodymium magnets an excellent choice for electromechanical applications. With far better permanent magnetic performance compared with traditional magnets, sintered NdFeB magnets are the key functional material