Static and dynamic magnetic properties of fine CoNi and FeCoNi particles synthesized by the polyol process

被引：31

作者：

Toneguzzo, P

Acher, O

Viau, G

Pierrard, A

Fiévet-Vincent, F

Fiévet, F

Rosenman, I

机构：

[1] CEA Ripault, F-37260 Monts, France

[2] Univ Paris 07, Lab Chim Mat Divises & Catalyse, F-75251 Paris 05, France

[3] Univ Paris 07, Phys Solides Grp, UMR 75 88, F-75251 Paris 05, France

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1999年 / 35卷 / 05期

关键词：

anisotropy constant; exchange resonance modes; fine ferromagnetic particles; polyol process;

D O I：

10.1109/20.800560

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Fine CoNi and FeCoNi particles elaborated by the polyol process over a wide size range display a core shell texture. From the study of the coercivity and remanence against the particle size, the critical size below which the CoNi particles are single domains is estimated in the 20-40 nm range. The comparison between static and dynamic properties shows that exchange resonance modes are observed for non single domain particles. Anisotropy constants are found to increase as the particle size decreases and as the Co content increases.

引用

页码：3469 / 3471

页数：3