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Rare-earth nitrides and carbides: A new class of permanent magnet materials

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Abstract

The most recent and exciting development in permanent magnet research is the discovery of rare-earth nitrides and carbides with the 2:17- and l:12- type structures. Nitrogen and carbon enter the lattice interstitially, expanding the volume of the unit cell and leading to a drastic increase in the Curie temperature (up to 300 °C) and to dramatic changes in the magnetic anisotropy. Sm2Fe17N(C))x and Nd(Fe,T)12Nx now have large magnetic anisotropy fields exceeding 9 and 7 T, respectively. Large coercivities have already been obtained in mechanically alloyed powders, melt- spun ribbons, and Zn- bonded Sm2Fe17Nx magnets.

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Authors and Affiliations

  1. Department of Physics and Astronomy, University of Delaware, Newark, Delaware

    G. C. Hadjipanayis, Y. Z. Wang & E. W. Singleton

  2. University of Missouri Research Reactor, Columbia, Missouri

    W. B. Yelon

Authors
  1. G. C. Hadjipanayis
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  2. Y. Z. Wang
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  3. E. W. Singleton
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  4. W. B. Yelon
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Hadjipanayis, G.C., Wang, Y.Z., Singleton, E.W. et al. Rare-earth nitrides and carbides: A new class of permanent magnet materials. JMEP 1, 193–203 (1992). https://doi.org/10.1007/BF02648617

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  • DOI: https://doi.org/10.1007/BF02648617

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