Enhanced dielectric permittivity on yttrium doped cobalt ferrite nanoparticles

被引：26

作者：

Franco, A., Jr. ^{[1
]}

Pessoni, H. V. S. ^{[1
]}

Alves, T. E. P. ^{[2
,3
]}

机构：

[1] Univ Fed Goias, Inst Fis, Goiania, Go, Brazil

[2] Univ Fed Goias, Inst Quim, Goiania, Go, Brazil

[3] Inst Fed Goias, Anapolis, Go, Brazil

来源：

MATERIALS LETTERS | 2017年 / 208卷

关键词：

Cobalt ferrite; Yttrium-doped cobalt ferrite; Dielectric permittivity; Combustion reaction method; GD3+ SUBSTITUTION; NANOCRYSTALS; DISPERSION; SPINEL;

D O I：

10.1016/j.matlet.2017.04.101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanoparticles (NPs) of CoYxFe2-xO4 (0 <= x <= 0: 04) were synthesized by combustion reaction method in order to study the effect of Y3+ ions (x) on the dielectric properties. It was found that the relative dielectric permittivity (epsilon') measured in a broad range frequency 100-2 MHz at room temperature. epsilon' increases with the Y3+ ions concentration and decreased with frequency, being 200 (83), and 998 (320) at 100 Hz (1KHz) for x = 0 and x = 0: 04, respectively. The experimental data could be fitted to the Cole-Cole model and the relaxation time (tau) was found to increase with Y3+ ions concentration. The results were discussed in the terms of space charge polarization and ions distribution over tetrahedral A-site and octahedral Bsites of the spinel structure and cation vacancies due to the presence of Y3+ ions in the spinel structure of cobalt ferrites. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：115 / 117

页数：3

共 27 条

[1] Structural, electrical, and optomagnetic tweaking of Zn doped CoFe2-xZnxO4-δ nanoparticles [J].