Rare-earth magnet and method of manufacturing the same

A method of manufacturing a rare-earth magnet, comprising:

• preparing magnetic powder including magnetic phases containing Sm, Fe, and N, at least a part of the magnetic phases having a crystal structure of one of a Th2Zn17 type and a Th2Ni17 type;
• preparing reforming material powder containing metallic zinc;
• mixing the magnetic powder and the reforming material powder to obtain mixed powder;
• subjecting the mixed powder to compression molding in a magnetic field to obtain a magnetic-field molded body;
• subjecting the magnetic-field molded body to pressure sintering to obtain a sintered body;
• and
• subjecting the sintered body to heat treatment, wherein:
• a content proportion of the metallic zinc in the reforming material powder is greater than 20% by mass and is equal to or less than 30% by mass with respect to the mixed powder;
• and
• when a temperature and time in conditions for the heat treatment are defined as x° C. and y hours, respectively, the following formulas are met:
• y≥−0.32x+136
• 350≤x≤410, and
• y≥14.4,
• wherein the rare-earth magnet has an orientation degree of 0.92 or higher and a magnetization in an external magnetic field of −1600 kA/m of no lower than 0.47.