On the High-Energy Product Fe–Pt Permanent Magnet Alloys

Preparation of Fe–Pt–Si Amorphous Ribbons and Their Coercivity after Crystallization

“…Among those L1 0 intermetallic compounds, FePt with equiatomic composition has large uniaxial magnetocrystalline anisotropy, and saturation of magnetization at room temperature. 1) Moreover, non-equiatomic L1 0 FePt alloys exhibit better magnetic properties than the equiatomic alloy, and Fe-38.5Pt alloy has the largest maximum energy product 2) among the Fe-Pt binary alloys. For the Fe-Pt binary system, only the L1 0 FePt phase has good hard magnetic properties, unlike the other two low temperature equilibrium L1 2 phases, Fe 3 Pt and FePt 3 .…”

Phase transformations and thermodynamic properties of nanocrystalline FePt powders

“…Several approaches are used to obtain ordered L1 0 phase [3]. It can be formed by annealing of the disordered face-centered cubic (fcc) (A1) phase [2], [4] and [5]. In the thin fi lm-form, the L1 0 FePt phase can be directly prepared by deposition onto heated substrates [6].…”

Shapes, multiple twins and surface structures of monodisperse FePt magnetic nanocrystals

“…The chemically ordered FePt alloy (L1 o , P4/ mmm) is a promising material for a new generation of ultrahigh density magnetic recording media [26,27], since it has a large uniaxial magnetocrystalline anisotropy (K u ffi 7 Â 10 6 J/m 3 ) [28,29] and shows excellent hard magnetic properties [30][31][32][33]. The fabrication of nano-size FePt particles with Surface Science 505 (2002) 325-335 www.elsevier.com/locate/susc controlled size and composition is a key for its applications.…”