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Role of interface morphology in the exchange-spring behavior of FePt/Fe perpendicular bilayers / F. Casoli in Acta materialia, Vol. 58 N° 10 (Juin 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 10 (Juin 2010) . - pp. 3594–3601 Titre : Role of interface morphology in the exchange-spring behavior of FePt/Fe perpendicular bilayers Type de document : texte imprimé Auteurs : F. Casoli, Auteur ; F. Albertini, Auteur ; L. Nasi, Auteur Année de publication : 2011 Article en page(s) : pp. 3594–3601 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : 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 [article] Role of interface morphology in the exchange-spring behavior of FePt/Fe perpendicular bilayers [texte imprimé] / F. Casoli, Auteur ; F. Albertini, Auteur ; L. Nasi, Auteur . - 2011 . - pp. 3594–3601. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 10 (Juin 2010) . - pp. 3594–3601 Mots-clés : 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