| Titre : | Role of interface morphology in the exchange-spring behavior of FePt/Fe perpendicular bilayers (2011) |
| Auteurs : | F. Casoli, Auteur ; F. Albertini, Auteur ; L. Nasi, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Acta materialia (Vol. 58 N° 10, Juin 2010) |
| Article en page(s) : | pp. 3594–3601 |
| Note générale : | Métallurgie |
| Langues : | Anglais |
| Tags : | Magnetic recording thin films Iron alloys Transmission electron microscopy FePt exchange-coupled bilayers Interfaces |
| Résumé : | The role of interface morphology in the magnetic behavior of FePt/Fe exchange-coupled systems has been considered. Hard/soft bilayers with different interface morphologies were obtained by depositing Fe thin layers on FePt epitaxial layers with different morphologies, but all with a high degree of L10 ordering and high coercivity. It was found that the hard/soft coupling can be tuned by changing the FePt morphology, allowing tailoring of the hysteresis loops and modification of the magnetic regime at a fixed Fe thickness (from Rigid Magnet to Exchange-Spring magnet). Remarkably, all bilayer series showed a drastic reduction in coercivity with increasing Fe thickness to 3.5 nm (μ0HC ⩽ 1.1 T). |
| DEWEY : | 669 |
| ISSN : | 1359-6454 |
| En ligne : | http://www.sciencedirect.com/science/article/pii/S1359645410001151 |
