Synthesis of cobalt ferrite nano-particles and their magnetic characterization

El-Okr, Mohamed; Salem, Mohamed; Salim, Malinda; El‐Okr, R. M.; Ashoush, M. A.; Talaat, Mohamed

doi:10.1016/j.jmmm.2010.11.069

Cited by 151 publications

(50 citation statements)

References 21 publications

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“…The increase of the coercive field with increasing annealing temperature could be attributed to the grain growth [33]. The saturation magnetization of CFO films have been found to increase with an increase of annealing temperature due to better crystallization and larger grain size [33][34][35], in particular, the saturation magnetization for the film annealed at 750 • C is 283 emu/cm 3 , which is comparable with that in Refs. [13,21,26,33,34].…”

Section: T ( • C)supporting

confidence: 83%

Perpendicular magnetic anisotropy in 70nm CoFe2O4 thin films fabricated on SiO2/Si(100) by the sol–gel method

Wang¹,

Zhang²,

Meng³

et al. 2011

Journal of Alloys and Compounds

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Section: T ( • C)supporting

confidence: 83%

Perpendicular magnetic anisotropy in 70nm CoFe2O4 thin films fabricated on SiO2/Si(100) by the sol–gel method

Wang¹,

Zhang²,

Meng³

et al. 2011

Journal of Alloys and Compounds

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“…It is also found that the peaks get weaker with increasing ferrite ratio in the composites, as shown in sample S4, and no peaks of any other crystal phases can be observed besides the CoFe 2 O 4 in the sample S3 and S4, confirming only CoFe 2 O 4 crystal dispersed in the PANI matrix. particles synthesized at 80°C is 8 nm to 10 nm, which is similar to the result obtained by El-Okr et al [41]. Fig.…”

Section: Characterization Of Samplessupporting

confidence: 90%

Double-layer microwave absorber based on nanocrystalline CoFe₂O₄and CoFe₂O₄/PANI multi-core/shell composites

Shen

et al. 2017

Materials Science-Poland

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Organic-inorganic nano-CoFe 2 O 4 /PANI (polyaniline) multi-core/shell composites have been successfully synthesized by chemical oxidative polymerization of aniline. The characterization results showed that the ferrite nanocrystals were efficiently embedded in PANI. The electromagnetic parameters of the composites were measured by a vector network analyser in the frequency range of 2 GHz to 18 GHz. Double-layer absorbers based on the CoFe 2 O 4 /PANI composite (matching layer) and calcined CoFe 2 O 4 ferrite (absorbing layer) have been designed. The reflection loss of the microwave absorbers of both single layer and double-layer with a total thickness of 2.0 mm and 2.5 mm was calculated according to transmission-line theory. The results indicated that the minimum reflection loss of the CoFe 2 O 4 /PANI composite was −19.0 dB at 16.2 GHz at the thickness of 2.0 mm and −23.6 dB at 13.1 GHz at the thickness of 2.5 mm, respectively. The minimum reflection loss for double-layer absorbers reached −28.8 dB at 16.2 GHz at the total thickness of 2.0 mm, and −31.1 dB at 12.8 GHz at the total thickness of 2.5 mm. The absorption bandwidth under −10 dB was 4.2 GHz (13.8 GHz to 18.0 GHz) and 5.5 GHz (10.3 GHz to 15.8 GHz), respectively. The results show that the reflection loss and absorption bandwidth of the double-layer absorbers are obviously enhanced compared to corresponding single layer absorbers.

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“…A wide variety of synthesis techniques like co-precipitation [40], micro emulsion [41][42], hydrothermal [43], and sol-gel technique [44] are used to synthesize Co-ferrite nanoparticles. Among these, sol-gel method is one of the best methods due to its advantage of low processing temperature, high purity, better homogeneity and single phase products [44,45].…”

Section: Introductionmentioning

confidence: 99%

Exchange spring like magnetic behavior in cobalt ferrite nanoparticles

Chithra

Anumol

Sahu

et al. 2016

Journal of Magnetism and Magnetic Materials

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Synthesis of cobalt ferrite nano-particles and their magnetic characterization

Cited by 151 publications

References 21 publications

Perpendicular magnetic anisotropy in 70nm CoFe2O4 thin films fabricated on SiO2/Si(100) by the sol–gel method

Perpendicular magnetic anisotropy in 70nm CoFe2O4 thin films fabricated on SiO2/Si(100) by the sol–gel method

Double-layer microwave absorber based on nanocrystalline CoFe₂O₄and CoFe₂O₄/PANI multi-core/shell composites

Exchange spring like magnetic behavior in cobalt ferrite nanoparticles

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Synthesis of cobalt ferrite nano-particles and their magnetic characterization

Cited by 151 publications

References 21 publications

Perpendicular magnetic anisotropy in 70nm CoFe2O4 thin films fabricated on SiO2/Si(100) by the sol–gel method

Perpendicular magnetic anisotropy in 70nm CoFe2O4 thin films fabricated on SiO2/Si(100) by the sol–gel method

Double-layer microwave absorber based on nanocrystalline CoFe2O4and CoFe2O4/PANI multi-core/shell composites

Exchange spring like magnetic behavior in cobalt ferrite nanoparticles

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Product

Resources

About

Double-layer microwave absorber based on nanocrystalline CoFe₂O₄and CoFe₂O₄/PANI multi-core/shell composites