Structural, morphological, dielectric and room-temperature magnetic studies of Ce3+ substituted nano crystalline cobalt ferrite

Syed Ismail Ahmad, M. B. Suresh, D. R. Kumar
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引用次数: 3

Abstract

Cerium substituted cobalt ferrite nanoparticles with composition formula, CoFe2-xCexO4 (x= 0.00, 0.075) have been synthesized by Sol-gel route method to study structural, morphological, dielectric and magnetic properties. XRD revealed the spinel structure of synthesized samples. An increase in specific surface area and decrease in crystallite were observed with increasing cerium concentrations. The SEM micrographs revealed some kind of agglomerations and non-uniform grain distributions. To confirmed the stoichiometry of the samples EDAX has been employed. Dielectric constant, dielectric loss at room temperature found decreased with increasing frequency showing a normal dielectric dispersion of ferrites. MS and HC were found decreased due to substitution of cerium ions which can be attributed to weakening of A-B interaction, decrease in particle size and surface effect. The MS and HC can be tailored for the application of nano cobalt ferrite particles in high density recording media.Cerium substituted cobalt ferrite nanoparticles with composition formula, CoFe2-xCexO4 (x= 0.00, 0.075) have been synthesized by Sol-gel route method to study structural, morphological, dielectric and magnetic properties. XRD revealed the spinel structure of synthesized samples. An increase in specific surface area and decrease in crystallite were observed with increasing cerium concentrations. The SEM micrographs revealed some kind of agglomerations and non-uniform grain distributions. To confirmed the stoichiometry of the samples EDAX has been employed. Dielectric constant, dielectric loss at room temperature found decreased with increasing frequency showing a normal dielectric dispersion of ferrites. MS and HC were found decreased due to substitution of cerium ions which can be attributed to weakening of A-B interaction, decrease in particle size and surface effect. The MS and HC can be tailored for the application of nano cobalt ferrite particles in high density recording media.
Ce3+取代纳米晶钴铁氧体的结构、形态、介电和室温磁性研究
采用溶胶-凝胶法制备了组成为CoFe2-xCexO4 (x= 0.00, 0.075)的铈取代钴铁氧体纳米颗粒,研究了其结构、形态、介电和磁性能。XRD分析了合成样品的尖晶石结构。随着铈浓度的增加,晶体的比表面积增加,晶型减少。SEM显微图显示出一定的团聚和不均匀的晶粒分布。为了确认样品的化学计量,采用了EDAX。介电常数、室温下的介电损耗随频率的增加而减小,表现为正常的铁氧体介电色散。质谱和HC由于铈离子的取代而降低,这可能是由于A-B相互作用减弱、颗粒尺寸减小和表面效应所致。MS和HC可以为纳米钴铁氧体颗粒在高密度记录介质中的应用量身定制。采用溶胶-凝胶法制备了组成为CoFe2-xCexO4 (x= 0.00, 0.075)的铈取代钴铁氧体纳米颗粒,研究了其结构、形态、介电和磁性能。XRD分析了合成样品的尖晶石结构。随着铈浓度的增加,晶体的比表面积增加,晶型减少。SEM显微图显示出一定的团聚和不均匀的晶粒分布。为了确认样品的化学计量,采用了EDAX。介电常数、室温下的介电损耗随频率的增加而减小,表现为正常的铁氧体介电色散。质谱和HC由于铈离子的取代而降低,这可能是由于A-B相互作用减弱、颗粒尺寸减小和表面效应所致。MS和HC可以为纳米钴铁氧体颗粒在高密度记录介质中的应用量身定制。
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