Synthesis and characterization of structural, microstructural and ferroic properties of CoFe2O4 nanoparticles and CoFe2O4:BaTiO3 core-shell nanocomposites

被引：10
|
作者：
Oliveira, P. N. [1 ]
Alanis, D. [1 ]
Bini, R. D. [1 ]
Silva, D. M. [1 ]
Dias, G. S. [1 ]
Santos, I. A. [1 ]
Cotica, L. F. [1 ]
Guo, R. [2 ]
Bhalla, A. S. [2 ]
机构：
[1] Univ Estadual Maringa, Dept Phys, Av Colombo 5790, BR-87020900 Maringa, Parana, Brazil
[2] Univ Texas San Antonio, Dept Elect & Comp Engn, San Antonio, TX USA
来源：
INTEGRATED FERROELECTRICS | 2016年 / 174卷 / 01期
关键词：
Magnetic nanoaparticles; nanocomposites; core-shell; cobalt ferrite; barium titanate; IRON-OXIDE; POWDERS;
D O I：
10.1080/10584587.2016.1192907
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Cobalt ferrite magnetic nanoparticles (CFO) and CoFe2O4:BaTiO3 (CFO:BTO) nanocomposites were synthesized successfully by a polymeric method and by a combination of polymeric and citrate-gel methods, respectively. Nanoparticles with a uniform shape, good size distribution and a core-shell microstructure were observed by transmission electron microscopy images. X-ray diffraction and ATR-FTIR results attested a cubic spinel structure for CFO nanoparticles and composites core, as well as a BTO tetragonal perovskite structure for nanocomposites shell. All samples presented a ferrimagnetic-like behaviour at 300K, with coercive fields of 325Oe and 840Oe and saturation magnetizations of 46.2 and 59.6emu/g, respectively, for CFO and CFO:BTO (3:2).
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页码：88 / 97
页数：10
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