RARE EARTH PERMANENT MAGNET AND METHOD FOR PRODUCING RARE EARTH PERMANENT MAGNET

摘要

Provided are an Nd-Fe-B system rare earth permanent magnet which has improved coercivity by setting the concentration of nitrogen remaining after sintering to 800 ppm or less; and a method for producing a rare earth permanent magnet. An Nd-Fe-B system rare earth permanent magnet is configured by pulverizing a magnet material by dry grinding in a rare gas atmosphere, and then firing a molded body, which has been obtained by compaction molding in the same rare gas atmosphere, at a temperature from 800°C to 1180°C, so that a permanent magnet (1) having a concentration of nitrogen remaining after the sintering of 800 ppm or less, more preferably of 300 ppm or less is produced.