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 language | English (US) |
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Article number | 6558995 |
Pages (from-to) | 3215-3220 |
Number of pages | 6 |
Journal | IEEE Transactions on Magnetics |
Volume | 49 |
Issue number | 7 |
DOIs | |
State | Published - 2013 |
Keywords
- Magnetic anisotropy
- magnetization processes
- permanent magnets
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering