Synthesis and magnetic properties of ferrimagnetic CoFe2O4 nanoparticles embedded in an antiferromagnetic NiO matrix

被引：42

作者：

Artus, Mathieu ^{[1
]}

Ammar, Souad ^{[1
]}

Sicard, Lorette ^{[1
]}

Piquemal, Jean-Yves ^{[1
]}

Herbst, Frederic ^{[1
]}

Vaulay, Marie-Joseph ^{[1
]}

Fievet, Fernand ^{[1
]}

Richard, Vincent ^{[2
]}

机构：

[1] Univ Paris 07, CNRS, ITODYS, UMR 7086, F-75251 Paris, France

[2] Univ Paris 06, CNRS, UMR 7609, LRS, F-75252 Paris, France

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 15期

关键词：

D O I：

10.1021/cm702464e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ultrafine cobalt ferrite nanoparticles were prepared by forced hydrolysis in diethyleneglycol and, after centrifugation, dispersed in the same solvent to form a sol in which a layered hydroxyacetate nickel salt was precipitated. The as-obtained composite was moderately calcined in air to form nanoparticles constituted by a ferrimagnetic CoFe2O4 core embedded in well-crystallized antiferromagnetic NiO. Magnetic properties such as coercivity, hysteresis loop shift, and blocking temperature were analyzed regarding exchange bias features by comparing the magnetic data measured on these particles to those obtained on fresh CoFe2O4 particles mechanically dispersed in a diamagnetic Al2O3 matrix.

引用

页码：4861 / 4872

页数：12

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