Enhanced dielectric permittivity on yttrium doped cobalt ferrite nanoparticles
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Data
2017
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Resumo
Nanoparticles (NPs) of CoYxFe2 xO4 (06 x 0:04) were synthesized by combustion reaction method in
order to study the effect of Y3þ ions (x) on the dielectric properties. It was found that the relative dielectric permittivity (e0
) measured in a broad range frequency 100–2 MHz at room temperature. e0 increases
with the Y3þ ions concentration and decreased with frequency, being 200 (83), and 998 (320) at 100 Hz
(1KHz) for x ¼ 0 and x ¼ 0:04, respectively. The experimental data could be fitted to the Cole–Cole model
and the relaxation time (s) was found to increase with Y3þ 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 Y3þ ions in the spinel structure of
cobalt ferrites.
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Cobalt ferrite, Yttrium-doped cobalt ferrite, Dielectric permittivity, Combustion reaction method
Citação
FRANCO JR., A.; PESSONI, H. V. S.; ALVES, T. E. P. Enhanced dielectric permittivity on yttrium doped cobalt ferrite nanoparticles. Materials Letters, Amsterdam, v. 208, p. 115-117, 2017. DOI: 10.1016/j.matlet.2017.04.101. Disponível em: https://www.sciencedirect.com/science/article/pii/S0167577X17306468. Acesso em: 4 set. 2023.