Effects of synthesis variables on the magnetic properties of CoFe2O4 nanoparticles

被引：56

作者：

Briceno, Sarah ^{[1
]}

Braemer-Escamilla, Werner ^{[1
]}

Silva, Pedro ^{[1
]}

Delgado, Gerzon E. ^{[2
]}

Plaza, Eric ^{[3
]}

Palacios, Jordana ^{[4
]}

Canizales, Edgard ^{[5
]}

机构：

[1] Inst Venezolano Invest Cient, Ctr Fis, Lab Fis Materia Condensada, Caracas 1020A, Venezuela

[2] Univ Los Andes, Fac Ciencias, Dept Quim, Lab Cristalog, Merida 5101A, Venezuela

[3] Inst Zuliano Invest Tecnol, Lab Microscopia Elect, La Canada, Venezuela

[4] Inst Venezolano Invest Cient, Ctr Quim, Lab Polimeros, Caracas 1020A, Venezuela

[5] Intevep SA, PDVSA, Area Anal Quim Inorgan, Los Teques 1070A, Venezuela

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2012年 / 324卷 / 18期

关键词：

Nanostructured material; Chemical synthesis; Magnetic measurement; FERRITE NANOPARTICLES; PARTICLES; COERCIVITY; ROUTE;

D O I：

10.1016/j.jmmm.2012.04.051

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cobalt ferrite nanoparticles (CoFe2O4) have been synthesized using precipitation in water solution with polyethylene glycol as surfactant. Influence of various synthesis variables included pH, reaction time and annealing temperature on the magnetic properties and particle sizes has also been studied. Structural identification of the samples was carried out using Thermogravimetric and Differential thermal analysis. X-ray diffraction, Fourier transform infrared spectroscopy. Scanning electron microscopy, High resolution transmission electron microscopy. Vibrating sample magnetometer was used for the magnetic investigation of the samples. Magnetic properties of nanoparticles show strong dependence on the particle size. The magnetic properties increase with pH of the precipitating medium and annealing temperature while the coercivity goes through a maximum, peaking at around 25 nm. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：2926 / 2931

页数：6

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