Electrical and magnetic behaviour of nanostructured MgFe2O4 spinel ferrite

Sivakumar, N.; Narayanasamy, A.; Grenèche, Jean‐Marc; Murugaraj, R.; Lee, Y.S.

doi:10.1016/j.jallcom.2010.05.125

Cited by 116 publications

(46 citation statements)

References 45 publications

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“…Electrical conductivity gives the significant information about conduction mechanism of ferrites. The electric conductivity of ferrites depends on various parameters like preparation methods, type of doping, temperature and sintering conditions and time [11,12]. Impedance spectroscopy is an outstanding technique to analyze the electrical conduction mechanism of ferrites.…”

Section: Introductionmentioning

confidence: 99%

Dielectric Response of Nix Zn1-x Al Fe O4 Nanoferrites

Donta¹,

Katrapally²,

Pendyala³

2016

NanoWorld J

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Ni-Zn-Al nanoferrites of general formula Ni x Zn 1-x Al Fe O 4 (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) were synthesized by sol-gel auto combustion technique. The X-ray diffraction and FTIR studies confirmed the formation of single cubic spinel structure. Dielectric performance and AC conductivity of prepared mixed nanoferrites were carried out using LCR impedance meter. It was observed that both dielectric constant and dielectric loss were decreased by increasing the frequency whereas AC conductivity increases with applied frequency but decreases with increasing the Ni 2+ ion substitution for a fixed Al 3+ ion concentration. DC resistivity, activation energy and Curie temperature were calculated by using the two probe experimental method. It was observed that DC resistivity decreased whereas the charge mobility increased with increasing the temperature. DC resistivity and activation energy of the nanoferrite samples were increased with Ni 2+ ion substitution for a fixed Al 3+ ion concentration.

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Section: Introductionmentioning

confidence: 99%

Dielectric Response of Nix Zn1-x Al Fe O4 Nanoferrites

Donta¹,

Katrapally²,

Pendyala³

2016

NanoWorld J

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“…One goal of modern ferrite research and development has been to identify simpler processing schemes that do not rely upon high temperature treatments for inducing solid-state reactions [30]. Recently, Sivakumar et al [31] synthesized nano-structured MgFe 2 O 4 spinel with different grain sizes ranging between 19 and 72 nm using ceramic method followed by high-energy ball milling. Hankare et al [32] synthesized magnesium ferrite by co-precipitation method with grain size of 40 nm.…”

Section: Introductionmentioning

confidence: 99%

Novel preparation and properties of magnesioferrite nanoparticles

Deraz

Alarifi

2012

Journal of Analytical and Applied Pyrolysis

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“…Their results of frequency dependent dielectric loss (tan ı) behavior show relaxation spectra, where the authors determine relaxation time and the maximum frequency for the hopping mechanism. Sivakumar et al [5] have concluded that the real part of the dielectric constant (ε ) is found to be around 100 for milled MgFe 2 O 4 (with 27 nm and 19 nm grain size), which are two orders of magnitude smaller than that of the bulk MgFe 2 O 4 (micron size grains). The authors also observe anomalous behavior of dielectric constant (ε ), which has been explained based on the presence of both n-type and p-type charge carriers.…”

Section: Introductionmentioning

confidence: 99%

“…In the light of the literature [4][5][6][7][8][9] as discussed above, it is well known that the structural and the dielectric properties of ferrites 0925-8388/$ -see front matter © 2010 Elsevier B.V. All rights reserved. doi:10.1016/j.jallcom.2010.11.173 Table 1 Data on variation of lattice constant, X-ray density, actual density, crystallite size, grain size and dielectric constant (at 1 kHz) of Ni0.5−xCuxZn0.3Mg0.2Fe2O4 ferrite samples (where x = 0, 0.1, 0.3 and 0.5) with Cu-content.…”

Section: Introductionmentioning

confidence: 99%