Investigation of Magnetic and Dielectric Properties of Cobalt Cubic Spinel Ferrite Nanoparticles Synthesized by CTAB-Assisted Co-precipitation Method

2021 ◽  
Author(s):  
Mobeen Haneef ◽  
Iftikhar H. Gul ◽  
Majid Hussain ◽  
Ibrar Hassan
Keyword(s):  
Dielectric Properties ◽  
Spinel Ferrite ◽  
Ferrite Nanoparticles ◽  
Precipitation Method ◽  
Magnetic And Dielectric Properties ◽  
Co Precipitation

Microstructure and Magnetic properties of ferrite nanoparticles synthesized by  Co-precipitation method

2021 ◽  
Author(s):  
R. Sagayaraj ◽  
S.Aravazhi ◽  
G. Chandrasekaran
Keyword(s):  
Particle Size ◽  
Spinel Ferrite ◽  
Ferrite Nanoparticles ◽  
Precipitation Method ◽  
Mixed Spinel ◽  
Spinel Composition ◽  
Li Ion ◽  
Xrd Patterns ◽  
Co Precipitation ◽  
Microstructure And Magnetic Properties

Abstract In the current research, Cu0.5Co0.3Mo0.2Fe2O4 mixed ferrite nanoparticles have been synthesized using Co-precipitation method. XRD patterns show the development of polyphasic copper, cobalt and molybdenum mixed spinel composition. The particle size of ferrite system is 16nm and they are nanoparticles. The lattice constant was determined to be 8.368 Å used for the highest peak (311). FTIR spectroscopy shows the lower octahedral and higher tetrahedral frequency alignment of ions in the spinel ferrite leading to the octahedral 550 cm− 1 and the tetrahedral 471 cm− 1 vibration modes. TEM micrographs showed spherical morphology and their particle size less than 50 nm, which correlated XRD crystallite size. VSM shows excellent ferrimagnetic properties because of higher coercivity (985.29 G). These higher coercivity materials can make cathode content for Li-ion batteries.

scholarly journals Structural, magnetic and dielectric properties of ultrafine nickel substituted cobalt ferrite− reduced graphene oxide nanocomposites

2020 ◽  
Author(s):  
N. Ambikeswari ◽  
S. Manivannan
Keyword(s):  
Graphene Oxide ◽  
Dielectric Properties ◽  
Reduced Graphene Oxide ◽  
Cobalt Ferrite ◽  
Precipitation Method ◽  
One Pot ◽  
Reduced Graphene ◽  
Magnetic And Dielectric Properties ◽  
Co Precipitation ◽  
High Dielectric

Abstract Nickel substituted cobalt ferrite − reduced graphene oxide (NCF-RGO) composite was synthesized using a facile one-pot chemical co-precipitation method. The addition of graphene oxide (GO) leads to the dimensional decrease of NCF nanoparticles (< 10 nm) in the composite, which controls the magnetic and dielectric properties. Nickel with lower ionic radius, compared to cobalt and its substitution in the composite along with the incorporation of GO results in the transition of ferromagnetic to superparamagnetic ordering. A large magnetisation of 51.63 emu/g and a high dielectric constant of 3.92 x 10 6 (at 100 Hz) were also developed from the composite. The conjugated mechanism of magnetic combined electrical property, with a high charge–storing capability and tuneable magnetization, enables its potential use in magnetic flipping or switching devices and data storing systems.

A correlated structural and electrical study of manganese ferrite nanoparticles with variation in sintering temperature

2017 ◽  
Vol 31 (26) ◽  
pp. 1750236 ◽  
Author(s):  
Elangbam Chitra Devi ◽  
Ibetombi Soibam
Keyword(s):  
Structural Changes ◽  
Spinel Phase ◽  
Spinel Ferrite ◽  
Average Crystallite Size ◽  
Ferrite Nanoparticles ◽  
Precipitation Method ◽  
Manganese Ferrite ◽  
Absorption Bands ◽  
Metal Chlorides ◽  
Co Precipitation

Manganese ferrite nanoparticles were prepared by chemical co-precipitation method. Metal chlorides and sodium hydroxide were used as precursor. The spinel phase formation of the prepared samples was confirmed by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). From the XRD data, the average crystallite size and lattice constant were calculated. FTIR spectra reveal the characteristic absorption bands of spinel ferrite due to M-O stretching vibrations in tetrahedral and octahedral sites. Manganese ferrite nanoparticles were further given sintering. The effect of sintering at different temperatures on the structural properties such as XRD, FTIR and electrical properties such as dielectric constant, dielectric loss and ac-conductivity was studied. Possible mechanism of structural changes and observed electrical behavior due to sintering is being discussed. A strong correlation has also been observed in the results obtained from different characterization techniques.

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