PURPOSE: To obtain a permanent magnet material having a high coersive force by obtaining powder of Sm-Fe-B alloy having a particular composition with the liquid quenching method, then nitriding such powder and obtain a bond magnet using this magnetic-powder.

CONSTITUTION: A permanent magnet material has the structure expressed by SmxFe(100-X-Y-Z)NrBZ (X, Y, Z are respectively indicated by atom percentages in the ranges of 8.0≤X≤20.0, 9.0≤Y≤15.0, 0.1≤Z≤0.5). In view of obtaining this permanent magnet material, the Sm-Fe-B alloy is melted in a button arc furnace and is then forged to have the predetermined composition. The forged material is again melted and is then cooled quickly in a liquid quenching apparatus to obtain a ribbon. The powder obtained by milling this ribbon is put into a tube furnace for nitriding. A bond magnet is produced by using this magnetic powder. According to this particular alloy elements, a permanent magnet material having excellent coersive force can be obtained.