Impact of Nd3+ in CoFe2O4 spinel ferrite nanoparticles on cation distribution, structural and magnetic properties

Autor: Lukáš Kalina, Vojtěch Enev, Jaromir Havlica, Ivo Kuřitka, Jiri Masilko, Raghvendra Singh Yadav, Zuzana Kožáková, Miroslava Hajdúchová, Jaromír Wasserbauer
Rok vydání: 2016
Předmět:
Zdroj: Journal of Magnetism and Magnetic Materials. 399:109-117
ISSN: 0304-8853
DOI: 10.1016/j.jmmm.2015.09.055
Popis: Nd 3+ doped cobalt ferrite nanoparticles have been synthesized by starch-assisted sol–gel auto-combustion method. The significant role played by Nd 3+ added to cobalt ferrite in changing cation distribution and further in influencing structural and magnetic properties, was explored and reported. The crystal structure formation and crystallite size were studied from X-ray diffraction studies. The microstructural features were investigated by field emission scanning electron microscopy and transmission electron microscopy that demonstrates the nanocrystalline grain formation with spherical morphology. An infrared spectroscopy study shows the presence of two absorption bands related to tetrahedral and octahedral group complexes within the spinel ferrite lattice system. The change in Raman modes in synthesized ferrite system were observed with Nd 3+ substitution, particle size and cation redistribution. The impact of Nd 3+ on cation distribution of Co 2+ and Fe 3+ at octahedral and tetrahedral sites in spinel ferrite cobalt ferrite nanoparticles was investigated by X-ray photoelectron spectroscopy. Room temperature magnetization measurements showed that the saturation magnetization and coercivity increase with addition of Nd 3+ substitution in cobalt ferrite.
Databáze: OpenAIRE
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