Method for producing magnetic particles, magnetic particles, and permanent magnet using the same

A method for producing magnetic particles containing a manganese-aluminum alloy, the method comprising:

• mixing manganese particles, an aluminum source, an activator containing a halide, and an anti-sintering agent to obtain a mixed powder;
• heating the mixed powder to a temperature in a range of 1,000° C. to 1,235° C. to calorize the manganese particles by utilizing gaps between particles of the anti-sintering agent formed by the anti-sintering agent, to obtain a treated mixture containing magnetic particles containing a manganese-aluminum alloy,
• wherein a mass ratio of aluminum to manganese (Al/Mn) in the manganese-aluminum alloy is in a range from 25/75 to 35/65;
• and
• removing the anti-sintering agent from the treated mixture to recover the magnetic particles containing the manganese-aluminum alloy.