Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1805077 | Journal of Magnetism and Magnetic Materials | 2006 | 5 Pages |
Abstract
Magnetoelastic effects in ultra soft nanocrystalline alloys are investigated theoretically and experimentally. From Hc measurements, extraction of magnetoelastic contribution is carried out using a formalism obtained revisiting random anisotropy model (RAM) in the light of domain walls (DW) displacements, our approach based on theoretical investigations on the way of a reversal of a correlated volume (CV) located in the vicinity of a DW. Modelling of magnetoelastic effects shows that even in perfectly relaxed samples, a magnetoelastic contribution exists due to elastic frustration experienced by a CV during its magnetization reversal. Magnitude of this energy is large enough to drive coercivity of samples featuring grain diameter D around 10Â nm, which are of major interest for applications.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Geoffroy Olivier, Chazal Hervé, Porteseil Jean-Louis, Waeckerlé Thierry, Alves Francisco,