Perspectives in permanent magnetism

Abstract

Recent developments in rare-earth permanent magnetism are reviewed with emphasis on (i) new materials, especially interstitially modified rare-earth iron alloys which combine a high Curie temperature with large uniaxial anisotropy, (ii) new nanostructures, including those which interleave hard and soft regions on the scale of the domain wall width of the hard phase, (iii) new processes aimed at cost-effective large-scale production of high energy permanent magnets, and (iv) new permanent magnet flux sources.