Predicting the future of permanent-magnet materials

Ralph Skomski, Priyanka Manchanda, Pankaj K. Kumar, B. Balamurugan, Arti Kashyap, D. J. Sellmyer

Research output: Contribution to journalArticle

114 Scopus citations

Abstract

There are two main thrusts towards new permanent-magnet materials: improving extrinsic properties by nanostructuring and intrinsic properties by atomic structuring. Theory - both numerical and analytical - plays an important role in this ambitious research. Our analysis of aligned hard-soft nanostructures shows that soft-in-hard geometries are better than hard-in-soft geometries and that embedded soft spheres are better than sandwiched soft layers. Concerning the choice of the hard phase, both a high magnetization and a high anisotropy are necessary. As an example of first-principle research, we consider interatomic Mn exchange in MnAl and find strongly ferromagnetic intralayer exchange, in spite of the small Mn-Mn distances.

Original languageEnglish (US)
Article number6558995
Pages (from-to)3215-3220
Number of pages6
JournalIEEE Transactions on Magnetics
Volume49
Issue number7
DOIs
StatePublished - 2013

Keywords

  • Magnetic anisotropy
  • magnetization processes
  • permanent magnets

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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    Skomski, R., Manchanda, P., Kumar, P. K., Balamurugan, B., Kashyap, A., & Sellmyer, D. J. (2013). Predicting the future of permanent-magnet materials. IEEE Transactions on Magnetics, 49(7), 3215-3220. [6558995]. https://doi.org/10.1109/TMAG.2013.2248139