Magnetocrystalline anisotropy of NiCoFe2O4 nanoparticles

被引：12

作者：

de Biasi, Ronaldo Sergio ^{[1
,2
]}

de Souza Lopes, Rayanne Dezio ^{[1
,2
]}

机构：

[1] Inst Mil Engn, Dept Engn Mecan & Mat, Praca Gen Tiburcio 80, BR-22290270 Rio De Janeiro, RJ, Brazil

[2] Inst Mil Engn, Sec Engn Mecan & Mat, BR-22290270 Rio De Janeiro, RJ, Brazil

来源：

CERAMICS INTERNATIONAL | 2016年 / 42卷 / 07期

关键词：

Sol-gel processes; Magnetic properties; Ferrites; HYPERTHERMIA;

D O I：

10.1016/j.ceramint.2016.02.141

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nanosized particles of Ni1-xCoxFe2O4 were synthesized by the sol-gel combustion method and the physical properties of these mixed ferrites were studied by X-ray diffraction and ferromagnetic resonance. The average crystallite size in samples with different Ni-Co ratios was determined from the X-ray diffractograms, whereas ferromagnetic resonance spectra were used to study the dependence of the magnetocrystalline anisotropy on the relative concentration of nickel and cobalt. According to the X-ray diffractograms, the samples are single phase and the crystallite size is between 9 and 22 nm. The ferromagnetic resonance spectra showed that the magnetocrystalline anisotropy of the samples is positive, except for pure NiFe2O4, and increases monotonically with Co concentration, a result that could be of interest for practical applications. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：9315 / 9318

页数：4

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