Structural, dielectric and electrical properties of zinc doped nickel nanoferrites prepared by simplified sol–gel method

Nasir, S.; Asghar, Ghulam; Malik, Muhammad Ali; Anis-ur-Rehman, M.

doi:10.1007/s10971-011-2468-x

Cited by 50 publications

(9 citation statements)

References 24 publications

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“…Figure 6 shows the Cole-Cole plot (complex impedance plot) for the impedance of all the samples at room temperature. Similar trends could be seen in the literature [8,14]. The impedance spectroscopy helps in the separation of grain and grain boundary because each of them has different relaxation times, resulting in separate semicircles in complex impedance plane.…”

Section: Impedancesupporting

confidence: 83%

“…For preparation of hexaferrites by WOWS sol-gel, ethylene glycol was used as a gelling agent. Precursor reagents mass-to-ethylene glycol ratio was optimized at 1:14 [8,9]. The solutions thus obtained were heated at 80 °C till the gel is formed, and then, temperature was raised to 150 °C to get the fine powder.…”

Section: Methodsmentioning

confidence: 99%

“…The consequence of frequencies on the electrical behavior can be elucidated based on charge transport phenomena [7]. The usual fabrication methods used for hexaferrites are hydrothermal techniques, co-precipitation approach and simplified or WOWS sol-gel method [8,9]. WOWS sol-gel is wet chemical method (a simplified and more economic form of sol-gel method) used in the fields of material science and ceramics engineering.…”

Section: Introductionmentioning

confidence: 99%

“…This is a preferable method due to simplicity, high-purity goods and can produce dense coatings to overcome corrosion. In divergence to others, co-precipitation method has gained deep attention on immense industrial production, low cost and allows to control the particle size more resourcefully [8].…”

Section: Introductionmentioning

confidence: 99%

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Topical advances in synthesis for energy-efficient magnetoplumbite nanoferrites

Anis-ur-Rehman

2019

SN Appl. Sci.

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Next-generation magnetic devices will be planar, smaller, light weight, and will do well beyond the present state-of-theart devices. For this to become a reality, advances in ferrite materials must first be realized. Due to superior coercivity and lower material and processing cost, magnetoplumbites are preferred over the other types of hard ferrites. Magnetoplumbites are important hexagonal ferrites with formula RFe 12 O 19 where R may be barium (Ba), strontium (Sr) or lead (Pb). Energy losses are important issues in these magnetic materials. Although SrFe 12 O 19 have many advantages, but to lower the energy losses we need to improve the resistivity by reducing eddy current losses. Sr-Ba nanoferrites have potential for next generation of energy-efficient magnetic devices. Gadolinium (Gd) belongs to the lanthanide series. In this work, Sr hexaferrites and Sr-Ba hexaferrites doped with rare earth metal like Gd were synthesized to increase their resistivity. Strontium barium hexaferrites with composition Sr 1−x Ba x Fe 12−y Gd y O 19 (x = 0.0, 0.25 and y = 0.0, 0.20) were synthesized by without water and surfactants (WOWS) sol-gel method and co-precipitation method, respectively. All the synthesized samples showed hexagonal structure with P63/mmc space group. Crystallite sizes obtained using Scherrer's formula were in nanoregime. DC electrical properties as a function of temperature and dielectric spectroscopy as a function of frequency were evaluated and are correlated with the structural properties. A comparative study of different proportions of iron oxide and Gd dopant was carried out, and composition with x = 0.25 and y = 0.20 seems to be a suitable combination for high-frequency efficient devices.

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Section: Impedancesupporting

confidence: 83%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Topical advances in synthesis for energy-efficient magnetoplumbite nanoferrites

Anis-ur-Rehman

2019

SN Appl. Sci.

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“…The CeO 2 sample was prepared using wow sol-gel method [4][5]. Analytical grade precursers were used to prepare samples.…”

Section: Methodsmentioning

confidence: 99%

Structural and electrical studies of mixed metal/ceramic composite dielectric thin films

Abdullah

Munir

Saleemi

et al. 2015

2015 Joint IEEE International Symposium on the Applications of Ferroelectric (ISAF), International Symposium on Integrated Func

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Cerium oxide (Rare earth oxide ceramic) films were coated on ITO glass slides where CeO 2 was obtained by a simplified sol-gel method. The layer of molten NiO (Metal oxide) was physiosorped on ceria.The synthesis parameters like molarity of the precipitating agent and annealing temperature of the as prepared films were optimized. The X-ray diffraction was used for the confirmation of the phase, crystal structure and determination of crystallite sizes. The morphology of annealed films was studied using atomic force microscopy. The ac electrical measurements were done using LCR meter at room temperature and in frequency range 1 kHz to 3 MHz. The ac conductivity, dielectric constant and dielectric loss were determined using the electrical data.

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Ferrites Obtained by Sol–Gel Method

Shirsath¹,

Wang²,

Jadhav³

et al. 2016

Handbook of Sol-Gel Science and Technology

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Ferrites are ferrimagnetic materials, a broad class of magnetic oxides with its remarkable structural, electrical, and magnetic properties making them suitable for a variety of applications. These properties strongly depend upon the method of preparation. Sol-gel method is having countless advantages over other methods to obtain the ferrite with desired nanoarchitecture. In this chapter, the effects of

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Structural, dielectric and electrical properties of zinc doped nickel nanoferrites prepared by simplified sol–gel method

Cited by 50 publications

References 24 publications

Topical advances in synthesis for energy-efficient magnetoplumbite nanoferrites

Topical advances in synthesis for energy-efficient magnetoplumbite nanoferrites

Structural and electrical studies of mixed metal/ceramic composite dielectric thin films

Ferrites Obtained by Sol–Gel Method

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