Paula N. Oliveira, Denise Alanis, Rquel. D. Bini, Daniel. M. Silva, Gustavo. S. Dias, Ivair. A. Santos, Luiz. F. Cótica, Ruyan Guo & Amar. S. Bhalla.

Integrated Ferroelectrics – Volume: 174, Páginas: 88-97, Issue: Doi:10.1080/10584587.2016.1192907

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 300 K, with coercive fields of 325 Oe and 840 Oe and saturation magnetizations of 46.2 and 59.6 emu/g, respectively, for CFO and CFO:BTO (3:2).