Neodymium iron boron permanent magnetic materials are based on the intermetallic compound Nd2Fe14B. The main components are rare earth (Nd), iron (Fe), and boron (B). The rare earth element Nd can be partially substituted with other rare earth metals such as dysprosium (Dy) and praseodymium (Pr) to achieve different properties. Iron can also be partially replaced by other metals like cobalt (Co) and aluminum (Al). Although the content of boron is relatively low, it plays a crucial role in forming the tetragonal crystal structure of the intermetallic compound, resulting in high saturation magnetization, high uniaxial anisotropy, and high Curie temperature.