METHOD FOR PRODUCING A RARE EARTH-BASED MAGNET

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A method for producing a rare earth-based magnet is provided that comprises providing a precursor sintered R2Fe14B-type magnet where R represents a rare earth element, applying particles comprising a rare earth element R′ to a first surface of the precursor sintered magnet, applying particles of further material to the first surface of the precursor magnet and/or a further surface of the precursor magnet and heat treating the precursor sintered magnet. The heat treating is carried out at a temperature T for a time t selected to allow diffusion of the rare earth element R′ into the precursor sintered magnet to produce a magnet. The further material remains solid and particulate after the heat treating.