Nanoparticles of CoxFey□zO4:: Synthesis and superparamagnetic properties

被引：76

作者：

Ngo, AT

Bonville, P

Pileni, MP

机构：

[1] Univ Paris 06, CNRS, URA 1662, Lab Struct & Reactiv Syst Interfaciaux, F-75005 Paris, France

[2] CEA Saclay, DSM, DRECAM, Serv Chim Mol, F-91191 Gif Sur Yvette, France

[3] CEA Saclay, DSM, DRECAM, Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France

来源：

EUROPEAN PHYSICAL JOURNAL B | 1999年 / 9卷 / 04期

关键词：

D O I：

10.1007/s100510050801

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

By using oil in water micelles, cobalt ferrite particles having an average diameter around 3 nm were synthetised. These nanoparticles are characterized by the presence of cation vacancies and no Fe(II) is observed, as it has been described in literature previously. Chemical interfacial treatment allows to coat the particles with citrate derivatives. The magnetic properties of uncoated and coated particles strongly diluted in a polymer substrate are compared by magnetization measurements and Fe-57 Mossbauer spectroscopy. The anisotropy constant is shown to be independent of coating, whereas the magnetization is found to be larger in the uncoated particles.

引用

页码：583 / 592

页数：10

共 53 条

[11] EXACT ANALYTIC FORMULA FOR THE CORRELATION TIME OF A SINGLE-DOMAIN FERROMAGNETIC PARTICLE [J].