On the structural, magnetic and electrical properties of sol–gel derived nanosized cobalt ferrite

Gopalan, E. Veena; Joy, P.A.; Al‐Omari, I. A.; Kumar, D. Sakthi; Yoshida, Yasuhiko; Anantharaman, M. R.

doi:10.1016/j.jallcom.2009.06.033

Cited by 143 publications

(50 citation statements)

References 32 publications

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“…The increase in peak intensities with temperature was due to the increase in crystallinity and particle size during the calcination process. The values of lattice parameter (a ¼ b ¼ c) of synthesised CoFe 2 O 4 were found to be equal to 8.37 Å , which agreed well with the standard value of 8.39 Å for CoFe 2 O 4 [15]. The dimensions of the crystallite size of the calcined powders were calculated using X-ray peak-broadening of the diffraction peaks (3 1 1) and (4 4 0) using Scherrer's formula [23] and found to be approximately 18 nm.…”

Section: Crystal Structure and Particle Size Analysissupporting

confidence: 80%

“…[10][11][12]15,19] or comparable [13,[16][17][18] with other reported methods. Moreover, this method does not require any corrosive reagent like NaOH and any elaborate experimental setup.…”

Section: Magnetic Measurementmentioning

confidence: 70%

“…We have reviewed several chemical synthesis methods used for the preparation of ferrites [8,9]. Synthesis routes are commonly used for CoFe 2 O 4 are co-precipitation [10][11][12][13][14], sol-gel [15,16], *Corresponding author. Email: naren70@yahoo.com precursors [17][18][19], reverse micelle [20], microemulsion [21], hydrothermal [22], etc.…”

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.

show abstract

Section: Crystal Structure and Particle Size Analysissupporting

confidence: 80%

“…[10][11][12]15,19] or comparable [13,[16][17][18] with other reported methods. Moreover, this method does not require any corrosive reagent like NaOH and any elaborate experimental setup.…”

Section: Magnetic Measurementmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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 magnetic study of very small particles was done but for a low cobalt concentration (x<0.6) [22]. The conductivity and Neel temperature dependence with grain size has been investigated in nanocrystalline cobalt ferrite powder for one composition only, namely CoFe 2 O 4 [19][20][23][24]. Most of the magnetic or electric investigations of nanoparticles of cobalt ferrites in literature concern Cd , Al or Zn doped ferrites [25][26][27].…”

mentioning

confidence: 99%

Magnetic, electric and thermal properties of cobalt ferrite nanoparticles

Ajroudi

Mliki

Bessaïs

et al. 2014

Materials Research Bulletin

142

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“…Banyak ragam metode preparasi yang dikembangkan dalam mensintesis nanopartikel magnetik, antara lain sol-gel [8,9], hydrothermal synthesis [10], ball milling [11], chemical precipitation [12] dan citrate-gel method [13], thermolysis [14], solvothermal [15], combustion [16], microemulsion [17] and citrate methods [18]. Ragam metode ini menghasilkan distribusi ukuran butiran kristalit yang relatif sempit jika dilakukan pada kondisi lingkungan normal [19].…”

Section: Pendahuluanunclassified

Pengaruh Two Step Annealing pada Struktur Kristal Nanopartikel Cobalt Ferrite Hasil Ko-presipitasi

Amalia

2015

JFA

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IntisariPengaruh two step annealing terhadap struktur kristal nanopartikel cobalt ferit hasil ko-presipitasi telah dikaji pada penelitian ini. Hasil FTIR menunjukkan bahwa cobalt ferit berstruktur spinel terbentuk pada sekitar daerah k = 590 cm −1 . Perlakuan temperatur pre-heating pada skema two step annealing menurunkan transmitansi namun tidak menggeser angka gelombang terbentuknya cobalt ferit. Konfirmasi struktur kristal menggunakan XRD menegaskan bahwa cobalt ferit terbentuk berstruktur kubus fcc dengan intensitas puncak maksimum terjadi pada sudut 2θ = 35,7• . Hasil analisis Scherrer menunjukkan bahwa perlakuan pre-heating pada skema two step annealing dapat memodifikasi ukuran butiran kristalin sampel cobalt ferit yang dihasilkan. AbstractTwo step annealing dependence on crystal structure in co-precipitated cobalt ferrite nanoparticles have been examined. The FTIR results showed that the cobalt ferrite spinel structure was observed at k = 590 cm −1 . Treatment of pre-heating temperature has lowered transmittance and has not shifted wave numbers of cobalt ferrite vibration. Confirmation of crystalline structure using XRD indicated that fcc cobalt ferrite was seen at diffraction peak of 2θ = 35,7• . Scherer analysis showed that pre heating treatment can modify crystal size of cobalt ferrite sample. Kemudian larutan tersebut dititrasi kedalam larutan NaOH (4,8 M) sambil diaduk menggunakan magnetic stirrer (1000 rpm) dengan temperatur 95• C. Setelah larutan terbentuk, dilakukan proses pengendapan didalam gelas beker yang kemudian hasil endapan ini disebut precursor. Langkah berikutnya adalah pencucian precursor menggunakan aquades dan aceton secara berulang-ulang hingga c Jurusan Fisika FMIPA ITS -79

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On the structural, magnetic and electrical properties of sol–gel derived nanosized cobalt ferrite

Cited by 143 publications

References 32 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

Magnetic, electric and thermal properties of cobalt ferrite nanoparticles

Pengaruh Two Step Annealing pada Struktur Kristal Nanopartikel Cobalt Ferrite Hasil Ko-presipitasi

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On the structural, magnetic and electrical properties of sol–gel derived nanosized cobalt ferrite

Cited by 143 publications

References 32 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

Magnetic, electric and thermal properties of cobalt ferrite nanoparticles

Pengaruh Two Step Annealing pada Struktur Kristal Nanopartikel Cobalt Ferrite Hasil Ko-presipitasi

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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