Magnetic and optical properties of ionic ferrofluids based on nickel ferrite nanoparticles

被引：100

作者：

Hasmonay, E

Depeyrot, J

Sousa, MH

Tourinho, FA

Bacri, JC

Perzynski, R

Raikher, YL

Rosenman, I

机构：

[1] Univ Paris 06, Lab Milieux Desordonnes & Heterogenes, CNRS, UMR 7603, F-75252 Paris 05, France

[2] Univ Brasilia, Dept Quim, BR-70910900 Brasilia, DF, Brazil

[3] Univ Brasilia, Inst Fis, BR-70910900 Brasilia, DF, Brazil

[4] Inst Continuous Media Mech, Lab Complex Fluids, Perm 614013, Russia

[5] Univ Paris 06, Phys Solides Grp, CNRS, UMR 7588, F-75251 Paris 05, France

[6] Univ Paris 07, Phys Solides Grp, CNRS, UMR 7588, F-75251 Paris 05, France

来源：

JOURNAL OF APPLIED PHYSICS | 2000年 / 88卷 / 11期

关键词：

D O I：

10.1063/1.1288016

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

New ionic ferrofluids containing NiFe2O4 nanoparticles of size less than or equal to 10 nm are investigated. The crystalline structure of the particles is probed by transmission electron microscopy and x-ray scattering. Static magnetization and field-induced birefringence measurements are performed on three samples differing by particle volume fraction. Cross analyzing of the results of those two types of macroscopic tests completely rejects a simple single-domain particle model but readily supports the two-component scheme of a particle as consisting of a core with a uniform magnetization and a surface layer of comparable thickness stowed with a spin-glass-like arrangement. (C) 2000 American Institute of Physics. [S0021-8979(00)00618-6].

引用

页码：6628 / 6635

页数：8

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