Cation distribution and magnetic properties of Zn doped NiFe2O4 nanoparticles synthesized by PEG-assisted hydrothermal route

Kavas, H.; Baykal, A.; Toprak, Muhammet S.; Köseoğlu, Yüksel; Sertkol, M.; Aktaş, B.

doi:10.1016/j.jallcom.2009.01.014

Cited by 232 publications

(84 citation statements)

References 37 publications

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“…Coercivity represents the strength of the magnetic field necessary to surpass the anisotropic barrier and allows the magnetization of the nanomagnetic particles. Temperature influences the coercivity H c as it has been observed in superparamagnetic specimens, and with an increase in temperature the coercivity tends to vanish with increase [23]. The obtained M s and H c values in the present study are found to be in the range 11-21 emu/g and 149-525 Oe.…”

Section: Electrical Propertiessupporting

confidence: 79%

Synthesis, Structural, Electrical, Magnetic Curie Temperature and Y–K Angle Studies of Mn–Cu–Ni Mixed Spinel Nanoferrites

Faraz

Maqsood

2011

J Supercond Nov Magn

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Nanoferrites of composition Mn 0.50 Cu 0.5−x Ni x Fe 2 O 4 (0.00 ≤ x ≤ 0.50) are prepared by chemical coprecipitation method. The prepared nano-ferrites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy (IR), two probe resistivity apparatus, and vibrating sample magnetometer (VSM) to study the compositional, structural, morphological, electrical, and magnetic properties with varying concentration (x) in the composition of the prepared nanoferrites. XRD confirmed formation of single phase spinel ferrite with crystalline size in the range of 16-29 nm. The lattice parameter (a) decreases with a decrease of Cu concentration. Further information about the structure and morphology of the nanoferrites was obtained from SEM and results are in good agreement with XRD. FTIR gives information about distribution of cations and anions by confirming the presence of high and low frequency bands due to tetrahedral and octahedral sites, respectively. The electric properties were measured and analyzed by using homemade two probe resistivity apparatus showing semiconducting behavior of synthesized ferrites. The magnetic hysteresis curves clearly indicate the soft nature of the prepared samples. Various magnetic parameters such as saturation magnetization (M s ), and remanence (M r ) are calculated from the hysteresis loops and observed compositional dependent. Saturation magnetization and magnetic moment increase with Ni content. This is due to the existence of localized canted spin. Coercivity and A. Faraz ( ) · A. Maqsood

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Section: Electrical Propertiessupporting

confidence: 79%

Synthesis, Structural, Electrical, Magnetic Curie Temperature and Y–K Angle Studies of Mn–Cu–Ni Mixed Spinel Nanoferrites

Faraz

Maqsood

2011

J Supercond Nov Magn

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“…[7] In this structure, the tetrahedral site is fully occupied by Fe 3+ , while the octahedral site is occupied by Ni 2+ and Fe 3+ ions. It is reported that a site inversion takes place as the particle size is reduced.…”

Section: Introductionmentioning

confidence: 91%

Raman study of NiFe₂O₄ nanoparticles, bulk and films: effect of laser power

Ahlawat

Sathe

2010

J Raman Spectroscopy

251

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Nanoparticles, bulk and thin films of NiFe 2 O 4 compounds are studied by micro-Raman spectroscopy. The effect of varying the incident laser power up to 40 mW was studied in all forms of the samples. The spectra showed a large magnitude of red shift and line broadening as a result of high incident laser power. It is shown that the inverse spinel structure remains robust, and no trace of laser-induced oxidation was observed. The low-temperature study of the bulk and nanoparticles has also been carried out for elucidating thermal effects due to the high incident laser power. The rise in temperature for maximum incident laser power of 40 mW was estimated to be ∼625 • C.

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“…PEG is a short-chain polymer with a uniform and ordered chain structure, which can be easily adsorbed on the surface of metal oxide colloid. This strong interaction kinetically decreases the activities of metal oxide colloid, and thus control the growth rates of various crystallographic facets of crystals which can control the morphology [22][23][24][25] . In this research, regular and spherical particles were obtained at low and high concentrations of PEG (in all A, B, and C sample series), respectively.…”

Section: Patilmentioning

confidence: 99%

Morphological Characterization of Tungsten Trioxide Nanopowders Synthesized by Sol-Gel Modified Pechini's Method

Ghasemi

Jafari

2017

Mat. Res.

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Sol-gel modified Pechini's method was used to prepare WO 3 nanopowders using dicarboxylic acid and polyethylene glycol as the chelating agent and polymeric source, respectively. WO 3 powders were first prepared by calcination of resin precursor at 550ºC under various initial concentrations of metal ion (12.5-50 mmol), acid (125-500 mmol), a complexing agent (32-262 mmol), and polyethylene glycol (1-16.5 mmol) in the air atmosphere. The products were characterized using X-ray powder diffraction, field emission scanning electron microscopy, and energy dispersive spectroscopy. The results revealed that the WO 3 nanopowders prepared with different amounts of chelating agent and polyethylene glycol, crystallized in monoclinic phase. The nanopowders were impurity-free due to the presence of the complexing agent and polyethylene glycol as carbon sources. Morphological evolution indicated that the nanopowders evolved from rod-like to regular and spherical shapes, depending on complexing agent and polyethylene glycol amounts. Nanopowders with an average particle size of approximately 58 nm and a narrow size distribution were obtained.

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Cation distribution and magnetic properties of Zn doped NiFe2O4 nanoparticles synthesized by PEG-assisted hydrothermal route

Cited by 232 publications

References 37 publications

Synthesis, Structural, Electrical, Magnetic Curie Temperature and Y–K Angle Studies of Mn–Cu–Ni Mixed Spinel Nanoferrites

Synthesis, Structural, Electrical, Magnetic Curie Temperature and Y–K Angle Studies of Mn–Cu–Ni Mixed Spinel Nanoferrites

Raman study of NiFe₂O₄ nanoparticles, bulk and films: effect of laser power

Morphological Characterization of Tungsten Trioxide Nanopowders Synthesized by Sol-Gel Modified Pechini's Method

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Cation distribution and magnetic properties of Zn doped NiFe2O4 nanoparticles synthesized by PEG-assisted hydrothermal route

Cited by 232 publications

References 37 publications

Synthesis, Structural, Electrical, Magnetic Curie Temperature and Y–K Angle Studies of Mn–Cu–Ni Mixed Spinel Nanoferrites

Synthesis, Structural, Electrical, Magnetic Curie Temperature and Y–K Angle Studies of Mn–Cu–Ni Mixed Spinel Nanoferrites

Raman study of NiFe2O4 nanoparticles, bulk and films: effect of laser power

Morphological Characterization of Tungsten Trioxide Nanopowders Synthesized by Sol-Gel Modified Pechini's Method

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Raman study of NiFe₂O₄ nanoparticles, bulk and films: effect of laser power