Method for producing a rare-earth magnet

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A method of manufacturing a rare earth magnet includes (i) manufacturing a rare earth magnet precursor using a sintered compact which is obtained by sintering magnetic powder which is a rare earth magnet material; (ii) causing a modifying alloy to diffusively penetrate into the rare earth magnet precursor so as to manufacture the rare earth magnet; and (iii) causing the modifying alloy to diffusively penetrate into the rare earth magnet precursor by adhering a sheet material, in which alloy powder of the modifying alloy is dispersed in a thermoplastic resin, to a surface of the rare earth magnet precursor and performing a heat treatment on the sheet material.