Synthesis and magnetic properties of CoFe2O4 ferrite nanoparticles

Zi, Zhenfa; Sun, Yan; Zhu, Xuebin; Yang, Zhichao; Dai, Jianming; Song, Wenhai

doi:10.1016/j.jmmm.2008.11.004

Cited by 338 publications

(134 citation statements)

References 35 publications

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“…CoFe 2 O 4 finds a plethora of applications in various fields including high-density recording media, high-density digital recording disks, magnetic fluids, data storage, microwave devices, magneto-optics devices, sensors, high-frequency applications and catalysis. Recently, the possibility of using CoFe 2 O 4 nanoparticle in magnetic drug delivery and various medical applications including radio-frequency hyperthermia, magnetic resonance imaging and medical diagnostics has been explored [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterisation of pure single-phase CoFe₂O₄ nanopowder via a simple aqueous solution-based EDTA-precursor route

Rajput

Hazra

Ghosh

2012

Journal of Experimental Nanoscience

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Single-phase cobalt ferrite (CoFe 2 O 4 ) nanopowder, with average particle size �20 nm, has been synthesised using an ethylene diamine tetra acetic acid precursor-based method. CoFe 2 O 4 nanopowder was obtained by calcining precursor at 550 � C for 4 h in air. The change of microstructure of the synthesised CoFe 2 O 4 with increasing sintering temperature was studied using scanning electron microscopy. DC electrical resistivities of unsintered and sintered samples were measured using a two-probe method. Room temperature magnetic hysteresis measurement revealed that the synthesised CoFe 2 O 4 nanopowder exhibited ferromagnetic behaviour at room temperature with saturation magnetisation of 67.55 emu/g and coercivity of 1645.24 Oe.

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Section: Introductionmentioning

confidence: 99%

“…In view of the above, we have undertaken a comprehensive investigation on the development of a simple chemical method for the preparation of single-phase CoFe 2 4 OH. After complete dissolution of EDTA, the solution was boiled to remove the excess NH 3 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterisation of pure single-phase CoFe₂O₄ nanopowder via a simple aqueous solution-based EDTA-precursor route

Rajput

Hazra

Ghosh

2012

Journal of Experimental Nanoscience

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“…The applications of CoFe 2 O 4 are strongly influenced by its magnetic properties. Various preparation techniques have been accordingly developed to produce CoFe 2 O 4 nanoparticles including chemical co-precipitation (Zi et al, 2009, Gnanaprakash et al, 2007, Qu et al, 2006, microemulsion (Li et al, 2003, Mathew et al, 2007, sol-gel method (Monte mayor et al, 2007, He et al,), hydrothermal , solvothermal (Liu et al, 2007), organic precursor method (Rashad et al, 2008, Toksha et al, 2008, ball milling (Chinnasamy et al, 2000, Khedr et al, 2006, forced hydrolysis in a polyol medium (Wang et al, 2008, BenTahar et al, 2008, mechanochemical method (Yang et al, 2004, Shi et al, 2000, sonochemical (Shafi et al, 1997) and complexometric synthesis (Thang et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Transition Metal Ions (Zn, Ni, Mn) Doped Cofe2o4 Nanoparticles

Balakrishnan¹

2016

IOSR

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48.35 and 20.93 nm, 45.77 and 8.51 nm and 49.45 and 43.74 0.28 and 1.17, 0.27 and 1.33, 0.28 and 2.0 emu/g and 3.16 and 0.37, 4.18 and 0.47, 2.89 and 0.48 emu/g and 92.14 and 612.09, 132.57 and 849.90, 75.74 and 193.65 Oe respectively. It can be observed that while increasing the doping concentration the saturation magnetization and Coercivity gets increases simultaneously the remanent magnetization gets decreases for all the three dopants.

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“…The magnetic properties of spinel ferrites are also influenced by the particle size and their distribution [7,8]. Hence synthesis of spinel ferrites under suitable conditions to attain uniform octahedron structure with nanosize particle size will help to study the influence of magnetic properties with respect to exchange interactions between A and B cations and also the particle size and their distribution.…”

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confidence: 99%

Characterization and Magnetic Behaviour of Nanosized Binary Spinel Ferrites Synthesized by Low Temperature Hydrothermal Method and their Stability in Aqueous Suspensions

Ammal¹,

Jebarathinam²,

Jayalakshmi³

2017

Asian J. Chem.

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INTRODUCTIONFerro spinel compounds possess high permeability so that they can be used in electronics [1][2][3], in microwave and high density information storage devices [4], as ferrofluids [5] and magnetic drug delivery materials [6], etc. Spinel ferrites, possessing cubically close packed array of oxygen anions with the metallic ions occupy two crystallographically different sites, i.e. octahedral [B] and tetrahedral (A) site. Three kind of magnetic interactions are possible, between metallic ions, through the intermediate O ions, by super-exchange mechanism, namely, A-A interaction, B-B interaction and A-B interaction. It has been established experimentally that these interaction energies are negative and hence induce an anti-parallel orientation.Due to the specific electronic configurations of cations and the types of super-exchange interactions among them, the magnetic properties of ferrites are strongly dependent on the occupancy and exchange of cations in the two sites. In spinel ferrites, direct interactions are negligible, due to the large distance between cations. Super-exchange interaction occurs between two metal cations through the existence of a bridging oxygen ion. It involves the temporary transfer of one oxygen 2p electron to a neighboring metal ion. The A-B interaction is the strongest super-exchange interaction in the spinel structure, followed Cobalt ferrite, nickel ferrite and zinc ferrite spinel oxides are synthesized by low temperature hydrothermal method using ethylenediamine tetracetic acid (EDTA) as complexing agent. FTIR and XRD studies show the formation of pure and single spinel phase. The average crystalline size was determined from X-ray diffraction line broadening using Scherrer equation. FE-SEM studies revealed that all the synthesized ferrites are having nearly octahedron crystals with an average particle size of 20 to 40 nm. Magnetic behavior of cobalt ferrite, nickel ferrite and zinc ferrite spinels studied by vibrating sample magnetometer at room temperature shows ferromagnetic behaviour of cobalt ferrite, super paramagnetic nature of nickel ferrite and non-magnetic behaviour of zinc ferrite. Zeta potential measured at various pH conditions shows that cobalt ferrite and nickel ferrite can be used for the preparation of magnetic nanofluids with stable colloidal dispersion at 4.5 > pH < 7.5 and 3.5 > pH < 9.5, respectively.

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Synthesis and magnetic properties of CoFe2O4 ferrite nanoparticles

Cited by 338 publications

References 35 publications

Synthesis and characterisation of pure single-phase CoFe₂O₄ nanopowder via a simple aqueous solution-based EDTA-precursor route

Synthesis and characterisation of pure single-phase CoFe₂O₄ nanopowder via a simple aqueous solution-based EDTA-precursor route

Synthesis and Characterization of Transition Metal Ions (Zn, Ni, Mn) Doped Cofe2o4 Nanoparticles

Characterization and Magnetic Behaviour of Nanosized Binary Spinel Ferrites Synthesized by Low Temperature Hydrothermal Method and their Stability in Aqueous Suspensions

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Synthesis and magnetic properties of CoFe2O4 ferrite nanoparticles

Cited by 338 publications

References 35 publications

Synthesis and characterisation of pure single-phase CoFe2O4 nanopowder via a simple aqueous solution-based EDTA-precursor route

Synthesis and characterisation of pure single-phase CoFe2O4 nanopowder via a simple aqueous solution-based EDTA-precursor route

Synthesis and Characterization of Transition Metal Ions (Zn, Ni, Mn) Doped Cofe2o4 Nanoparticles

Characterization and Magnetic Behaviour of Nanosized Binary Spinel Ferrites Synthesized by Low Temperature Hydrothermal Method and their Stability in Aqueous Suspensions

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Synthesis and characterisation of pure single-phase CoFe₂O₄ nanopowder via a simple aqueous solution-based EDTA-precursor route

Synthesis and characterisation of pure single-phase CoFe₂O₄ nanopowder via a simple aqueous solution-based EDTA-precursor route