Title :
Synthesis and structure of isolated L10 FePt particles
Author :
Bian, Bo ; Laughlin, David E. ; Sato, Kazuhisa ; Hirotsu, Yoshihiko
Author_Institution :
Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA
fDate :
9/1/2000 12:00:00 AM
Abstract :
Isolated FePt particles were fabricated by taking advantage of overgrowth of Fe on Pt particles and subsequent annealing at 873 K. The annealing lead to the formation of ordered tetragonal (L10) FePt particles with three orthogonal variants. The average size of FePt particles could be adjusted to less than 10 nm and no significant grain coarsening occurred upon annealing due to the existence of an amorphous Al2O3 layer. Nano-beam electron diffraction revealed that the lattice constant ratio c/a was approximately 0.97 for the annealed FePt particles with Fe composition close to 50 at.%
Keywords :
annealing; crystal structure; electron diffraction; ferromagnetic materials; iron alloys; lattice constants; magnetic particles; nanostructured materials; nanotechnology; particle size; platinum alloys; 873 K; Al2O3; Fe composition; FePt; L10 FePt particles; Pt particles; amorphous Al2O3 layer; annealed FePt particles; annealing; grain coarsening; isolated FePt particles; lattice constant ratio; nano-beam electron diffraction; ordered tetragonal FePt particles; orthogonal variants; particle size; structure; synthesis; Amorphous magnetic materials; Annealing; Electrons; Iron; Magnetic anisotropy; Magnetic recording; Magnetic separation; Perpendicular magnetic anisotropy; Substrates; Superconducting films;
Journal_Title :
Magnetics, IEEE Transactions on
