One of the strongest magnet

NdFeB magnets has now emerged as the strongest magnetic rare earth magnets permanent magnet is most commonly used.
  NdFeB magnets are tetragonal crystal made of neodymium,magnetic grates iron and boron formation. In 1982 by the Japanese Sumitomo Special Metals Sagawa reality (Find neodymium magnet. This magnet energy product greater than samarium cobalt magnet, is the world's largest energy product material time later, Sumitomo Special Metals successful development of powder metallurgy. General Motors the successful development of the company Jet smelting method, capable of producing NdFeB magnets. This magnet is now the strongest permanent magnet magnetic rare earth magnet is the most commonly used.