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Structural, dielectric and low temperature magnetic response of Zn doped cobalt ferrite nanoparticles

TLDR
In this article, a sol-gel synthesis of Zn doped spinel Co1-xZnxFe2O4 (where x = 0.0, 0.1,0.2, and 0.3) was reported.
Abstract
The finely controlled nanostructured cubic spinel ferrites pave the way to synthesize nanomaterials with specific properties for particular applications. In this paper, we report sol-gel synthesis of Zn doped spinel Co1-xZnxFe2O4 (where x= 0.0, 0.1, 0.2, and 0.3) ferrite nanoparticles. X-ray diffraction confirms the single phase cubic structure of nano ferrites with average particle size estimated between 55.38 to 32.87 nm and validated by Transmission electron microscopy (TEM) results (±1). The lattice parameter was found to increase with increasing Zn doping concentration. The samples exhibit normal dielectric behaviour of Maxwell-Wagner type of interfacial polarization that decreases with increasing frequency of the applied field. Temperature-dependent magnetic properties were investigated with the aid of physical property system. The hysteresis measurements of the samples show clearly enhancement in magnetic parameters as the temperature goes down to 20 K. Tuning of magnetic properties has been witnessed as a function of doping and temperature under the influence of externally applied magnetic field, has been discussed in this paper.

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Cobalt ferrite nanoparticles and nanocomposites: Photocatalytic, antimicrobial activity and toxicity in water treatment

TL;DR: In this paper, a review of the current status of cobalt ferrite nanoparticles and nanocomposites with respect to its application in wastewater treatment, advantages, and toxicity aspects is presented.
Journal ArticleDOI

Tuning of Structural, Dielectric, and Electronic Properties of Cu Doped Co–Zn Ferrite Nanoparticles for Multilayer Inductor Chip Applications

TL;DR: In this article, the synthesis of nanoparticles and doping of Cu-doped Co-Zn ferrites using the auto-combustion sol-gel synthesis technique was reported.
Journal ArticleDOI

Improved room temperature dielectric properties of Gd3+ and Nb5+ co-doped Barium Titanate ceramics

TL;DR: In this paper, the synthesis of gadolinium (Gd) and niobium (Nb) co-doped barium titanate (BT) ceramic oxides prepared using a conventional solid-state reaction method was reported.
Journal ArticleDOI

Study of the effect of ion irradiation on increasing the photocatalytic activity of WO3 microparticles

TL;DR: In this article, the effect of low-energy irradiation with helium ions to increase the photocatalytic activity of tungsten oxide (WO3) microparticles, if used as catalysts for the decomposition of Rhodamine B, was studied.
Journal ArticleDOI

Improved microwave absorption and EMI shielding properties of Ba-doped Co–Zn ferrite

TL;DR: In this paper, the synthesis of Ba-doped Co-Zn ferrite nanoparticles using the sol-gel auto combustion technique was reported, and the single-phase formation of the samples with Fd3m space group was confirmed by X-ray diffraction (XRD).
References
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Journal ArticleDOI

Semiconductor Clusters, Nanocrystals, and Quantum Dots

TL;DR: In this article, the authors focus on the properties of quantum dots and their ability to join the dots into complex assemblies creates many opportunities for scientific discovery, such as the ability of joining the dots to complex assemblies.
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A Mechanism of Magnetic Hysteresis in Heterogeneous Alloys

TL;DR: In this paper, the effect of shape anisotropy on magnetization curves was studied for the case of ellipsoidal spheroids of revolution (e.g., ellipses of revolution).
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Synthesis and Characterization of Monodisperse Nanocrystals and Close-Packed Nanocrystal Assemblies

TL;DR: In this article, solution phase syntheses and size-selective separation methods to prepare semiconductor and metal nanocrystals, tunable in size from ∼1 to 20 nm and monodisperse to ≤ 5%, are presented.
Journal ArticleDOI

Perspectives on the Physical Chemistry of Semiconductor Nanocrystals

TL;DR: In this paper, the present status and new opportunities for research in this area of materials physical chemistry are reviewed, as well as a review of the present state and opportunities in this field.
Journal ArticleDOI

On the Dispersion of Resistivity and Dielectric Constant of Some Semiconductors at Audiofrequencies

C. G. Koops
- 01 Jul 1951 - 
TL;DR: In this paper, the ac resistivity and the apparent dielectric constant of the material show a dispersion which can be explained satisfactorily with the help of a simple model of the solid: there should be wellconducting grains separated by layers of lower conductivity.
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