Characterization of Chromium Substituted  Cobalt Nano Ferrites Synthesized by  Citrate-Gel Auto Combustion Method

Raghasudha, M.; Ravinder, D.; Veerasomaiah, P.

doi:10.4236/ampc.2013.32014

Cited by 34 publications

(8 citation statements)

References 17 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This implies that the basic structure of the nanoparticles is essentially same as that of the bulk material. The average particle sizes of the as-synthesized Co-Cr ferrites and calcined Co-Cr ferrites for different compositions were calculated from Scherrer formula [14] using the maximum intensity peak (311) and were shown in Table 1.…”

Section: Resultsmentioning

confidence: 99%

“…The starting materials for the synthesis of CoCr x Fe 2 − x O 4 (x = 0.0, 0.1, 0.3, 0.5, 0.7, 0.9 and 1.0) using citrate-gel autocombustion method were cobalt nitrate, ferric nitrate, chromium nitrate, citric acid, ammonia (99% pure; S D Fine-Chem Limited, Mumbai, India). The synthesis of Co-Cr nanoferrites by citrate-gel autocombustion technique was clearly reported in our earlier publication [14]. The synthesized powders were ground in agate mortar and pestle and calcined in a muffle furnace at 500°C for 4 h to obtain spinel phase.…”

Section: Synthesismentioning

confidence: 99%

See 1 more Smart Citation

Magnetic properties of Cr-substituted Co-ferrite nanoparticles synthesized by citrate-gel autocombustion method

2013

View full text Add to dashboard Cite

A series of Co-Cr nanoferrites having the chemical formula CoCr x Fe 2 − x O 4 (x = 0.0, 0.1, 0.3, 0.5, 0.7, 0.9, and 1.0) were synthesized by citrate-gel autocombustion method at a very low temperature (180°C). The X-ray diffraction analysis of as-synthesized powders and sintered powders has confirmed the formation of single-phase cubic spinel structure. The average particle size of the synthesized ferrites was 6 to 12 nm. Magnetic susceptibility measurements using Faraday magnetic susceptibility balance showed the paramagnetic nature of the ferrites. Magnetic properties of Co-Cr nanoferrites were measured using a vibrating sample magnetometer at room temperature in the applied field of 15 kOe. The saturation magnetization decreased from 33.84 to 13.83 emu/g with increase in Cr 3+ concentrations, indicating the fact that the lesser magnetic Cr 3+ ions substitute Fe 3+ ions in the octahedral sublattice of the ferrite. With improvement in the magnetic properties, the synthesized nanoferrites become soft magnetic materials. Such materials are useful in transformer and motor cores to minimize the energy dissipation with the alternating fields associated with AC electrical applications. The coercivity of pure CoFe 2 O 4 was larger than that of the Cr-doped cobalt ferrites.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Synthesismentioning

confidence: 99%

Magnetic properties of Cr-substituted Co-ferrite nanoparticles synthesized by citrate-gel autocombustion method

2013

View full text Add to dashboard Cite

show abstract

“…Physical, chemical and structural properties of oxide powders depend on preparation method and thermal treatment applied during preparation. A wide variety of methods are being used to synthesize spinel ferrite nanoparticles including citric acid combustion [12], sol-gel auto combustion [13], hydrothermal [14], co-precipitation methods [15,16]. In addition, thermolysis [17], wet chemical co-precipitation technique [18], self-propagating and microemulsion [19,20], are also used.…”

Section: Introductionmentioning

confidence: 99%

Structural and magnetic properties of MgFe2O4 nanopowder synthesized via co-precipitation route

et al. 2020

View full text Add to dashboard Cite

Mg ferrite was successfully synthesized by adopting a simple co-precipitation route. A physical property of Mg ferrite has been investigated employing XRD, FTIR, SEM, EDS, AFM and Raman spectroscopic techniques. The XRD results indicated the formation of single phase spinel ferrite with crystalline size of 36 nm. FTIR results confrmed ferrite tetrahedral (580 cm −1) and octahedral sites (430 cm −1) metal oxygen vibrations. The Raman result revealed the well defined Raman active modes of synthesized sample. Scanning electron microscopic (SEM) studies revealed nano crystalline nature of the sample. An elemental composition of the sample was studied by energy dispersive spectroscopy (EDS). Crystallite size, X-ray density, hopping length, and magnetic properties of the product are also reported. AFM provides surface roughness. The magnetic hysteresis curves clearly indicate the soft nature of the prepared nanoferrite. The Raman spectra shows five Raman active modes (A 1g + E g + 3F 2g) which are expected in the spinel structure and Raman spectra has a very good agreement with reported data. Various magnetic parameters such as saturation magnetization (M s), and remanence (M r) and coerciviy (H c) are obtained from the hysteresis loops.

show abstract

“…Synthesis. The nanocrystalline ferrites of the chemical composition MgCr Fe 2− O 4 ( = 0.0, 0.1, 0.3, 0.5, 0.7, 0.9 and 1.0) were prepared using Citrate-Gel auto combustion method [20]. The following chemicals are used as starting materials for the synthesis.…”

Section: Methodsmentioning

confidence: 99%

Effect of Cr Substitution on Magnetic Properties of Mg Nanoferrites Synthesized by Citrate‐Gel Auto Combustion Method

Raghasudha

Ravinder

Veerasomaiah

2013

Journal of Chemistry

Self Cite

View full text Add to dashboard Cite

A series of Mg-Cr nanoferrites with the chemical formula MgCr Fe 2− O 4 (0.0 ≤ ≤ 1.0) were synthesized by Citrate-Gel auto combustion method. The formation of single phase cubic spinel structure of the samples was confirmed by X-ray diffraction (XRD) analysis. It is observed that with the increase in the paramagnetic Cr content, the particle size of the ferrite compositions has decreased from 23 nm to 7 nm. Faraday magnetic Susceptibility Balance was used to measure the Magnetic susceptibility of synthesized samples that confirmed the paramagnetic nature of the ferrites. Vibrating Sample Magnetometer (VSM) was used to measure the Magnetic properties of nanoferrites under investigation at room temperature under the applied magnetic field of 15 kOe. With the increase in Cr 3+ concentration, the saturation magnetization has decreased from 11 emu/g to 1.5 emu/g.

show abstract

Characterization of Chromium Substituted Cobalt Nano Ferrites Synthesized by Citrate-Gel Auto Combustion Method

Cited by 34 publications

References 17 publications

Magnetic properties of Cr-substituted Co-ferrite nanoparticles synthesized by citrate-gel autocombustion method

Magnetic properties of Cr-substituted Co-ferrite nanoparticles synthesized by citrate-gel autocombustion method

Structural and magnetic properties of MgFe2O4 nanopowder synthesized via co-precipitation route

Effect of Cr Substitution on Magnetic Properties of Mg Nanoferrites Synthesized by Citrate‐Gel Auto Combustion Method

Contact Info

Product

Resources

About