Synthesis, structural, dielectric and magnetic properties of cobalt ferrite nanomaterial prepared by sol-gel autocombustion technique

Cubic spinel structured CoFe2O4 nanocrystalline material has been synthesized using the sol-gel auto combustion route. Structural parameters and phase formation were studied using room temperature powder X-ray diffraction (XRD). The result shows a pure cubic spinel structured sample formation with a...

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Published inPhysica. B, Condensed matter Vol. 581; p. 411769
Main Authors Mammo, Tulu Wegayehu, Murali, N., Kumari, Ch Vijaya, Margarette, S.J., Ramakrishna, A., Vemuri, Raghavendra, Shankar Rao, Y.B., Vijaya Prasad, K.L., Ramakrishna, Y., Samatha, K.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 15.03.2020
Elsevier BV
Subjects
Cobalt ferrites
CoFe2O4
Crystal structure
Cubic lattice
DC resistivity
Dielectric properties
Electric resistance
Field emission microscopy
Fourier transforms
Frequency ranges
Grain size
Magnetic properties
Nanocrystalline
Nanocrystals
Nanomaterials
NH3
Parameters
Room temperature
Sol-gel processes
Spinel
Spinel-structured
Structural analysis
Synthesis
X ray powder diffraction
CoFe2O4
NH3
Spinel-structured
DC resistivity
Nanocrystalline
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Summary:Cubic spinel structured CoFe2O4 nanocrystalline material has been synthesized using the sol-gel auto combustion route. Structural parameters and phase formation were studied using room temperature powder X-ray diffraction (XRD). The result shows a pure cubic spinel structured sample formation with a lattice parameter of 8.4277 Å. Field emission scanning electron microscopy (FESEM) microstructural characterization revealed the nanocrystalline structure of the so synthesized sample with non-homogeneous grain sizes and grain shapes. Fourier transform infrared (FT-IR) characterization confirmed the spinel structure formation by exhibiting the cation stretching-vibrations at the tetrahedral and octahedral sites. The DC resistivity measurement has been carried out using a two-probe technique and confirmed the high resistive nature of the sample. The room temperature dielectric and AC properties were investigated in the frequency ranges of 100 Hz–5 MHz. The dielectric dispersion has been observed at lower frequencies. Higher magnetization value has been measured using the VSM technique.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2019.411769