Interparticle interactions in annealed FePt nanoparticle assemblies

Author

Zeng, Hao ; Li, Jing ; Wang, Zhong L. ; Liu, J. Ping ; Sun, Shouheng

Author_Institution

IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

2598

Lastpage

2600

Abstract

Thermal treatment of self-assembled FePt nanoparticles reduces the interparticle distances, resulting in dramatic changes in the type and strength of interparticle interactions. Consequently, magnetic properties such as the hysteresis and magnetization reversal mechanisms are strongly affected. It is suggested that controlled annealing of self-assembled nanoparticles may offer a novel approach for producing hard magnetic nanocomposites.

Keywords

annealing; coercive force; ferromagnetic materials; iron alloys; magnetic hysteresis; magnetic particles; magnetisation reversal; nanostructured materials; platinum alloys; remanence; self-assembly; FePt; annealed nanoparticle assemblies; chemical ordering; coercivity; exchange coupling; hard magnetic nanocomposites; interparticle distances; interparticle interactions; magnetic hysteresis; magnetization reversal; particle size; remanence ratio; saturation magnetization; self-assembled nanoparticles; thermal treatment; Annealing; Assembly; Magnetic anisotropy; Magnetic hysteresis; Magnetic materials; Magnetostatics; Nanoparticles; Perpendicular magnetic anisotropy; Self-assembly; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.803216

Filename

1042281