Effect of Co concentration on crystal structures and magnetic properties of Ni1-xCoxFe2O4 nanoparticles synthesized by co-precipitation method

Utomo, Joko; Agustina, A. K.; Suharyadi, Edi; Kato, Takeshi; Iwata, S.

doi:10.1080/10584587.2018.1445348

Cited by 10 publications

(4 citation statements)

References 16 publications

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“…The inset shows the almost linear variation of saturation magnetization with heating temperature.Coercivity also shows a similar tendency with T, increasing about 50% between 600 and 800ºC. As shown in Table2, the obtained values of Ms and Hc for sample NCF-0.5-800 agree with those previously reported for Ni 0.5 Co 0.5 Fe 2 O 4 synthesized by other methods[28,[52][53][54][55][56][57]. It is important to remark that from the vast existing literature on this mixed ferrite, only reports dealing with materials with similar particle size and heating temperatures were selected for the comparison.…”

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confidence: 88%

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Mechanochemical synthesis and characterization of nanocrystalline Ni1-xCoxFe2O4 (0 ≤ x ≤ 1) ferrites

Arango

Cristóbal

Ramos

et al. 2019

Journal of Alloys and Compounds

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confidence: 88%

“…Moreover, an increasing trend of crystallite size with x can be noticed, which may be related to the fact that Co 2+ could accelerate the relative nucleation rate and crystal growth [56][57][58][59].…”

Section: Resultsmentioning

confidence: 92%

Mechanochemical synthesis and characterization of nanocrystalline Ni1-xCoxFe2O4 (0 ≤ x ≤ 1) ferrites

Arango

Cristóbal

Ramos

et al. 2019

Journal of Alloys and Compounds

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“…Magnetic characterization was carried out by Riken Denshi Co. Ltd. Vibrating sample magnetometer (VSM) under external magnetic fields up to ±15000 Oe at room temperature [14]. The size and morphology were investigated by means of transmission electron microscopy (TEM) using JEOL JEM-1400 [15].…”

Section: Experiments Detailsmentioning

confidence: 99%

A synthesis of polyethylene glycol (PEG)-coated magnetite Fe₃O₄ nanoparticles and their characteristics for enhancement of biosensor

Antarnusa

Suharyadi

2020

Mater. Res. Express

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The magnetite Fe 3 O 4 nanoparticles were synthesized by using chemical co-precipitation method and these nanoparticles were successfully coated by polyethylene glycol (PEG) with variation concentrations of PEG. The magnetite Fe 3 O 4 nanoparticles used as a bimolecular label (nano-tags), exhibiting a soft magnetic behavior with magnetization (M s ) of 77.16 emu g −1 and coercivity (H c ) of 50 Oe respectively. The polyethylene glycol (PEG) was used as a biocompatible polymer. The x-ray diffraction (XRD) patterns of the Fe 3 O 4 showed that Fe 3 O 4 was well crystallized. It also confirmed the existence of invers spinel. The diffraction peak of 35.4°was used to calculate the crystallite size. The estimation of Fe 3 O 4 average crystallite size is 12 nm, while the PEG-coated Fe 3 O 4 nanoparticles is 8.6 nm. The transmission electron microscopy (TEM) images of Fe 3 O 4 showed that the morphology of magnetite Fe 3 O 4 nanoparticle is spherical in shape with uniform grain size and good dispersibility despite the agglomeration it found in some place. The addition of PEG can decrease the agglomeration and reduce the particle size. The existence of PEG layer on Fe 3 O 4 was confirmed by Fourier transform infrared (FTIR) spectroscopy. The result of Vibrating Sample Magnetometer (VSM) showed that saturation magnetization (M s ) of Fe 3 O 4 nanoparticles decreased from 77.16 to 37.15 emu g −1 with the increase of PEG weight from 0% to 50%. Such Fe 3 O 4 nanoparticles with favorable size and tunable magnetic properties are promising biosensor applications.

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“…Based on Table 1, the lattice parameter of Co-doped Ni -Zn ferrite is slightly higher than undoped Ni -Zn ferrite. This phenomenon can be related to the ionic radii of Ni 2+ (0.69 Å) being smaller than the ionic radii of Co 2+ (0.745 Å) in Co-doped Ni -Zn ferrite [13], [17]. Meanwhile, the value of crystallite size and x-ray density of Co-doped Ni -Zn ferrite are smaller than undoped.…”

Section: Structural Characteristicsmentioning

confidence: 93%

Investigation of Structures, Vibrational Spectra, and Morphological Characteristics of Undoped and Cobalt-doped Ni-Zn Ferrite

Utomo,

Kurniawan,

Taqwa

et al. 2022

JPSE

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Undoped and Co-doped Nickel Zinc ferrite (NiZnFe2O4) have been successfully prepared using the coprecipitation method with the further annealing treatment at 600 ºC. The structure, image, and vibrational spectra of the materials were investigated respectively by XRD, TEM, and FTIR characterizations. Based on XRD characterization results, both undoped and Co-doped Ni – Zn ferrite possesses a single-phase formation, namely spinel structure without any impurities from other phases. The lattice parameters of Co-doped Ni – Zn ferrite is 8.419 nm which is higher than undoped Ni – Zn ferrite (8.409 nm). Meanwhile, the average particle size obtained based on the results of the TEM characterization is 14.4 nm with slight agglomeration. The results of FTIR characterization on all samples provide information on the presence of metal ion vibrations at frequency bands about 493.78 cm-1 located at the tetrahedral and 514.99 cm-1 occupied at octahedral sites. Those frequency ranges confirmed that both samples have spinel structures.

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Effect of Co concentration on crystal structures and magnetic properties of Ni_1-xCo_xFe₂O₄ nanoparticles synthesized by co-precipitation method

Cited by 10 publications

References 16 publications

Mechanochemical synthesis and characterization of nanocrystalline Ni1-xCoxFe2O4 (0 ≤ x ≤ 1) ferrites

Mechanochemical synthesis and characterization of nanocrystalline Ni1-xCoxFe2O4 (0 ≤ x ≤ 1) ferrites

A synthesis of polyethylene glycol (PEG)-coated magnetite Fe₃O₄ nanoparticles and their characteristics for enhancement of biosensor

Investigation of Structures, Vibrational Spectra, and Morphological Characteristics of Undoped and Cobalt-doped Ni-Zn Ferrite

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Effect of Co concentration on crystal structures and magnetic properties of Ni1-xCoxFe2O4 nanoparticles synthesized by co-precipitation method

Cited by 10 publications

References 16 publications

Mechanochemical synthesis and characterization of nanocrystalline Ni1-xCoxFe2O4 (0 ≤ x ≤ 1) ferrites

Mechanochemical synthesis and characterization of nanocrystalline Ni1-xCoxFe2O4 (0 ≤ x ≤ 1) ferrites

A synthesis of polyethylene glycol (PEG)-coated magnetite Fe3O4 nanoparticles and their characteristics for enhancement of biosensor

Investigation of Structures, Vibrational Spectra, and Morphological Characteristics of Undoped and Cobalt-doped Ni-Zn Ferrite

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Effect of Co concentration on crystal structures and magnetic properties of Ni_1-xCo_xFe₂O₄ nanoparticles synthesized by co-precipitation method

A synthesis of polyethylene glycol (PEG)-coated magnetite Fe₃O₄ nanoparticles and their characteristics for enhancement of biosensor