Sol–gel synthesis of nanocrystalline Zn1−xNixFe2O4 ceramics and its structural, magnetic and dielectric properties

Atif, M.; Nadeem, M.

doi:10.1007/s10971-014-3484-4

Cited by 48 publications

(18 citation statements)

References 55 publications

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“…[4][5][6].The spinel structure name is offered due to its structure arrangement in which metal ions are distributed between (A site) tetrahedral and (B site) octahedral sites formed through the oxygen ions in a unit cell [7,8]. So, the distribution of metal ions through the A site and B site affects the magnetic properties of M-Fe 2 O 4 , which may be controlled by thermal treatment and crystallite size [9]. Nickel zinc ferrite belongs to the soft magnetic materials group, which is easily magnetized and demagnetized.…”

Section: Introductionmentioning

confidence: 99%

Crystallographic and Magnetic Properties of Al3+co-doped NiZnFe2O4 Nano- particles Prepared by Sol-gel Process

et al. 2018

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A l 2 O 3 SUBSTITUTED nickel zinc nano-ferrite Al x Ni 0.5-x Zn 0.5 Fe 2 O 4 (x = 0.0, 0.1, 0.2, 0.3) was prepared by the citrate sol-gel methodusing nickel, zinc, iron and aluminum nitratesand sintered at 800 o C for 3 h in air. Prepared nano-sized ferrites were characterized by X-ray diffraction, High resolution transmission and scanning electron microscopy and Fourier transforms infrared spectroscopy. The estimated crystallite sizes were in the range of 24.7-32.9 nm. HR-TEM data appears that all nano-ferrite samples are composed of more or less agglomerated nanoparticles with the average particle size of nanocrystallites is ~31 nm. The impact of introducing Al ions by Ni on themagnetic properties of the prepared nano-ferrite was investigated utilizing magnetic measurements at room temperature. The changing of crystallite sizes, lattice parameter and the surface area with increasing the Al content were determined. The saturation magnetization (Ms) and coercivity (Hc) values vary from 47.894-32.314 and 70.37-60.117 G; respectively.

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Section: Introductionmentioning

confidence: 99%

Crystallographic and Magnetic Properties of Al3+co-doped NiZnFe2O4 Nano- particles Prepared by Sol-gel Process

et al. 2018

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“…Several chemical, physical and mechanochemical methods are used in the literature to synthesize NiFe 2 O 4 nanoparticles such as hydrothermal reaction, co-precipitation, sol-gel method and ball milling [18][19][20][21][22]. In particular, the sol-gel method is a versatile technique to vary the properties of different transition metal oxides by controlling different parameters such as temperature, time of reaction, pH of the medium and the reagent's concentration [23].…”

Section: Introductionmentioning

confidence: 99%

Cation distribution and enhanced surface effects on the temperature-dependent magnetization of as-prepared NiFe2O4 nanoparticles

Nadeem

Siddique

2015

Appl. Phys. A

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Nickel ferrite, i.e., NiFe 2 O 4 , nanoparticles are synthesized by sol-gel method using urea as a neutralizing agent. The formation of spinel phase and crystal structure of the as-prepared sample is analyzed by X-ray diffraction and transmission electron microscope. In order to confirm phase formation and cation arrangement, room temperature 57 Fe Mössbauer spectroscopy is employed. The degree of inversion (i) estimated from the relative peak area is found to be 0.6, which confirms a mixed spinel structure of the asprepared sample. Zero-field-cooled/field-cooled measurements showed evidence of superparamagnetic behavior associated with the nanosized particles. Hysteresis loop measurements revealed temperature-dependent magnetic properties: The coercive field (H C ) decreases with increasing temperature and deviates from the Kneller's law for ferromagnetic nanostructures; and the saturation magnetization (M s ) follows modified Bloch's law in the temperature range between 25 and 400 K. However, below 25 K, an abrupt increase in magnetization of nanoparticles is observed. In order to understand this behavior, an additional contribution has to be added to the core magnetization to properly fit the data. Hence, a surface correction term to the Bloch's law is found to describe the temperature dependence of magnetization in the core-shell NiFe 2 O 4 nanoparticles.

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“…In this area and due to higher resistance of the grain boundaries, electrons accumulate and produce charge zone. The increase of the frequency decreases the probabilities of sensing the grain boundaries by the electrons, so the polarization decreases [38].…”

Section: Dielectric Studymentioning

confidence: 99%

Dependence of the Ni0.4Zn0.6Fe2O4 spinel ferrite on frequency and temperature using impedance spectroscopy tool

Hajlaoui

Dhahri

Kamel

2020

Preprint

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Ni0.4Zn0.6Fe2O4 ferrites were prepared by the conventional solid-state method. The X-ray study allowed the identification of a single orthorhombic phase. The conductivity of the prepared sample was measured at different frequencies in the temperature range 340 K to 600 K. The obtained results are discussed in terms of charge carriers hopping. We showed that the dielectric permittivity is high at different temperatures and various frequencies. The impedance plane findings present semicircle arcs at various temperatures and an electrical equivalent circuit was determined. In addition, the obtained two relaxation times were established as a function of temperature.

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Sol–gel synthesis of nanocrystalline Zn1−xNixFe2O4 ceramics and its structural, magnetic and dielectric properties

Cited by 48 publications

References 55 publications

Crystallographic and Magnetic Properties of Al3+co-doped NiZnFe2O4 Nano- particles Prepared by Sol-gel Process

Crystallographic and Magnetic Properties of Al3+co-doped NiZnFe2O4 Nano- particles Prepared by Sol-gel Process

Cation distribution and enhanced surface effects on the temperature-dependent magnetization of as-prepared NiFe2O4 nanoparticles

Dependence of the Ni0.4Zn0.6Fe2O4 spinel ferrite on frequency and temperature using impedance spectroscopy tool

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