| abstract |
The present invention provides a rare earth metal magnet in which the high temperature demagnetization rate can be inhibited even if the amount of heavy rare earth metal element (s) such as Dy and Tb is apparently reduced or compared to the past no such heavy rare earth element is used. The rare earth metal magnet of the present invention is a sintered magnet comprising R 2 T 14 B crystal grains as the main phases and the crystal boundary phases between the R 2 T 14 B crystal grains. The microstructure of the sintered body is controlled by including crystal boundary phases containing at least R, T and M in the crystal boundary phases, the relative atomic ratios of R, T and M being as follows, ie 60 to 80% for R, 15 to 35 % for T and 1 to 20% for M. |