Title :
Self-Assembly and Magnetic Properties of FePt, FeRh Nanoparticles, and FePt/FeRh Nanocomposite Particles
Author :
Ko, Hnin Yu Yu ; Suzuki, Takao
Author_Institution :
Inf. Storage Mater. Lab., Toyota Technol. Inst., Tempaku
Abstract :
FeRh nanoparticles with the composition of Fe75Rh25 and Fe36Rh64 have been fabricated by a solution phase chemical method. After refining and size selection, a particle size is about 2 to 5 nm by HRTEM observation. From XRD results, as-deposited FeRh nanopaticles reveal a typical chemically disordered fcc structure which can be transformed into CsCl-type structure through thermal annealing. In the case of annealed Fe64Pt36 nanoparticles, the perpendicular coercivity increases comparing with that of as-deposited particles. It may be the results of the crystal orientation of fct-phase
Keywords :
X-ray diffraction; annealing; coercive force; crystal orientation; ferromagnetic materials; iron alloys; magnetic particles; nanocomposites; nanoparticles; nanotechnology; particle reinforced composites; particle size; platinum alloys; rhodium alloys; self-assembly; transmission electron microscopy; FePt-FeRh; TEM; XRD; chemically disordered fcc structure; crystal orientation; nanocomposite particles; nanoparticles; particle size; perpendicular coercivity; refining; self-assembly; solution phase chemical method; thermal annealing; Annealing; Chemicals; Coercive force; Iron; Magnetic anisotropy; Magnetic materials; Magnetic properties; Nanoparticles; Self-assembly; X-ray scattering; FePt nanoparticle; FeRh nanoparticle; first order transition; perpendicular coercivity;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.888491
