Co–Zn ferrite nanoparticles for ferrofluid preparation: Study on magnetic properties

Arulmurugan, R.; Vaidyanathan, G.; Sendhilnathan, S.; Jeyadevan, Balachandran

doi:10.1016/j.physb.2005.03.025

Cited by 96 publications

(41 citation statements)

References 17 publications

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“…There is a need for development of water-based biocompatible ferrofluids of Fe 1Àx B x Fe 2 O 4 (B ¼ Mn, Co) particle. On the other hand, preparation of oil/organic solvent base ferrofluids of these ferrites and their properties are reported by several authors [13][14][15]. But there is scanty literature on the preparation of biocompatible ferrofluids of Fe 1Àx B x Fe 2 O 4 (B ¼ Mn, Co) ferrites.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterizations of water-based ferrofluids of substituted ferrites [Fe1−xBxFe2O4, B=Mn, Co (x=0–1)] for biomedical applications

Giri

Pradhan

Somani

et al. 2008

Journal of Magnetism and Magnetic Materials

113

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterizations of water-based ferrofluids of substituted ferrites [Fe1−xBxFe2O4, B=Mn, Co (x=0–1)] for biomedical applications

Giri

Pradhan

Somani

et al. 2008

Journal of Magnetism and Magnetic Materials

113

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“…Clearly, the magnetization of the treated particles is weaker than that of the untreated particles. From the plots of  vs. 1/H in high field [13] the specific saturation magnetizations  s are evaluated as 56.59 emu/g and 41.19 emu/g for the untreated and treated particles, respectively.…”

Section: Results and Analysismentioning

confidence: 99%

The Structure of Modified Fe-Ni Bioxide Composite Nanoparticles Using Fe(NO<sub>3</sub>)<sub>3</sub>

Lin¹,

Li²,

Li³

et al. 2013

ANP

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Composite nanoparticles containing a γ-Fe 2 O 3 core, Ni 2 O 3 external shell and FeCl 3 ·6H 2 O outermost layer can be synthesized by chemically induced transition in FeCl 2 solution. These may be modified by treatment with Fe(NO 3 ) 3 to obtain particles for the preparation of ionic ferrofluids. Vibrating sample magnetometer (VSM) measurements and transmission electron microscopy (TEM) observations show that after Fe(NO 3 ) 3 treatment, the specific magnetization becomes weaker and the size becomes larger for treated particles compared with the untreated particles. Using energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), the structure of the particles before and after the treatment is revealed. The experimental results show that the γ-Fe 2 O 3 core is unchanged, the Ni 2 O 3 is dissolved partially and the FeCl 3 ·6H 2 O is replaced by Fe(NO 3 ) 3 ·9H 2 O. The percentages of molar, mass and volume of these phases are deduced, and the average density of the modified particles is also estimated.

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“…Clearly, the γ -Fe 2 O 3 nanoparticles were ferrimagnetic, with a saturation magnetization M γ ,s that was estimated as 228.06 kA/m from the linear relationship between the magnetization M and 1/H in the high field limit. 20 As a result, the mean moment <m γ > could be estimated from <m γ > = π<d 3 >M γ ,s /6 as 6.5662 × 10…”

Section: A Samplesmentioning

confidence: 99%

The magneto-optical behaviors modulated by unaggregated system for γ-Fe2O3–ZnFe2O4 binary ferrofluids

Lin

et al. 2012

AIP Advances

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Under an external magnetic field, when circularly polarized light was transmitted through binary ferrofluids based on strongly magnetic γ-Fe2O3 and weakly magnetic ZnFe2O4 nanoparticles, the birefringence Δn and dichroism Δk arising from the chains of γ-Fe2O3 particles system were modulated and decreased by the unchained ZnFe2O4 particles. In our experiments, we used two types of ZnFe2O4 nanoparticles: one consisted of ZnFe2O4(1) particles with higher moments, and the other consisted of ZnFe2O4(2) particles with lower moments. Comparing the birefringence and dichroism of the γ-Fe2O3–ZnFe2O4(1) and γ-Fe2O3–ZnFe2O4(2) binary ferrofluids, it was found that the modulating action of the ZnFe2O4(2) particle system with lower moments was larger than that of the ZnFe2O4(1) particle system with higher moments. Using a model for a bi-dispersed system based on chained and unchained particles, the behavior of the modulating action was explained by an additional effective relative magnetic permeability, which depends on the background of the unchained ZnFe2O4 particles for the chained γ-Fe2O3 particles and a field-induced demixing phase transition. These results showed that for binary ferrofluids based on both strong and weak magnetic nanoparticles, the power of the modulation of the magneto-optical effects depends on the difference in magnetization between the particles

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Co–Zn ferrite nanoparticles for ferrofluid preparation: Study on magnetic properties

Cited by 96 publications

References 17 publications

Synthesis and characterizations of water-based ferrofluids of substituted ferrites [Fe1−xBxFe2O4, B=Mn, Co (x=0–1)] for biomedical applications

Synthesis and characterizations of water-based ferrofluids of substituted ferrites [Fe1−xBxFe2O4, B=Mn, Co (x=0–1)] for biomedical applications

The Structure of Modified Fe-Ni Bioxide Composite Nanoparticles Using Fe(NO<sub>3</sub>)<sub>3</sub>

The magneto-optical behaviors modulated by unaggregated system for γ-Fe2O3–ZnFe2O4 binary ferrofluids

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Co–Zn ferrite nanoparticles for ferrofluid preparation: Study on magnetic properties

Cited by 96 publications

References 17 publications

Synthesis and characterizations of water-based ferrofluids of substituted ferrites [Fe1−xBxFe2O4, B=Mn, Co (x=0–1)] for biomedical applications

Synthesis and characterizations of water-based ferrofluids of substituted ferrites [Fe1−xBxFe2O4, B=Mn, Co (x=0–1)] for biomedical applications

The Structure of Modified Fe-Ni Bioxide Composite Nanoparticles Using Fe(NO&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;3&lt;/sub&gt;

The magneto-optical behaviors modulated by unaggregated system for γ-Fe2O3–ZnFe2O4 binary ferrofluids

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The Structure of Modified Fe-Ni Bioxide Composite Nanoparticles Using Fe(NO<sub>3</sub>)<sub>3</sub>