RF dynamics in nanoparticle systems with tuned strength of interactions

Author

Spinu, L. ; Tung, L.D. ; Kolesnichenko, V. ; Fang, J. ; Stancu, A. ; O´Connor, C.J.

Author_Institution

Adv. Mater. Res. Inst., New Orleans Univ., LA, USA

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

2607

Lastpage

2609

Abstract

The dynamic response in a large experimental time window (10^-6-10² s) of Co and CoPt nanoparticle systems is reported. In order to reveal the dynamics effects, along with classic experiments as a.c. susceptibility and static magnetic measurements, a RF temperature dependent transverse susceptibility experiment is used. To study the effect of interaction between particles, samples of Co and CoPt nanoparticles dispersed in an insulating matrix in different volume fractions were investigated.

Keywords

cobalt; cobalt alloys; ferromagnetic materials; magnetic particles; magnetic susceptibility; nanostructured materials; platinum alloys; Co; CoPt; EDAX analysis; RF dynamics; dipolar interactions; dynamic response; higher amplitude peak; interparticle interactions; magnetic nanoparticle systems; temperature dependent susceptibility; transmission electron microscopy; transverse susceptibility; tuned strength of interactions; Insulation; Magnetic anisotropy; Magnetic moments; Magnetic properties; Magnetic susceptibility; Magnetization; Nanoparticles; Perpendicular magnetic anisotropy; Radio frequency; Temperature dependence;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.803206

Filename

1042285