Role of interface morphology in the exchange-spring behavior of FePt/Fe perpendicular bilayers

Authors :: Paola Luches
Simone Fabbrici
Franca Albertini
F. Bolzoni
R. Cabassi
Lucia Nasi
C. Bocchi
Francesca Casoli
Source :: Acta materialia 58 (2010): 3594–3601. doi:10.1016/j.actamat.2010.02.029, info:cnr-pdr/source/autori:Casoli F. a; Albertini F. a; Nasi L. a; Fabbrici S. a; Cabassi R. a; Bolzoni F a.; Bocchi C. a; Luches P. b/titolo:Role of interface morphology in the exchange-spring behavior of FePt%2FFe perpendicular bilayers/doi:10.1016%2Fj.actamat.2010.02.029/rivista:Acta materialia/anno:2010/pagina_da:3594/pagina_a:3601/intervallo_pagine:3594–3601/volume:58
Publication Year :: 2010
Publisher :: Elsevier BV, 2010.
Abstract: 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).

Subjects :: Thin layers
Materials science
Polymers and Plastics
Condensed matter physics
Bilayer
Metals and Alloys
Exchange-coupled media
Coercivity
Magnetic recording media
Epitaxy
Electronic, Optical and Magnetic Materials
LAYER SPUTTER-DEPOSITION
Hysteresis
Nuclear magnetic resonance
Transmission electron microscopy
Magnet
Ceramics and Composites
Coupling (piping)
FePt

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