Recent developments in rare earth intermetallic materials which may be suitable for bonded magnets are reviewed. These include isotropic coercive powder with a refined grain structure, isotropic single-phase powder showing remanence enhancement, exchange-coupled hard/soft nanostructures, anisotropic coercive powder, and two-phase dipole-coupled powders. Most of these new materials are based on Nd2Fe14B or Sm2Fe17N3.
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Coey et al. (1997) studied this question.
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