Electrical Resistivity and Magnetization Studies of the NdFeB System

The electrical resistivity of two NdFeB samples, Nd15 FeT7 Bs and NdS Fe 62 B33 3 has been studied with increasing and decreasing temperatures between 4 K and 1,200 K. The magnetization of these two samples was measured between 300 K and 1,000 K. According to experimental data, the a-Fe is manifestly precipitated above roughly 900 K. The magnetic phase transition near 570 K identified by X-ray analysis is due to the tetragonal Nd2 Fe14 B phase.