R-Fe-B based magnet having gradient electric resistance and method for producing the same

摘要

An R-Fe-B based magnet having gradient electric resistance and a method for producing the same are provided. The magnet includes an exterior layer (G) and a main body layer (H). The exterior layer (G) is connected with the main body layer (H) via a sintered layer (I). The oxygen content in the exterior layer (G) is higher than the oxygen content in the main body layer (H), so the electrical resistivity of the exterior layer (G) is not lower than the electrical resistivity of the main body layer (H). The R-Fe-B based magnet having gradient electric resistance is capable of maintaining high resistance and excellent magnetic performance simultaneously.