Influence of Nd3+ substitution on structural, electrical and magnetic properties of nanocrystalline nickel ferrites

Shinde, Tukaram J.; Gadkari, Ashok B.; Vasambekar, P. N.

doi:10.1016/j.jallcom.2011.10.001

Cited by 92 publications

(27 citation statements)

References 52 publications

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“…Ni-Zn ferrite is a soft magnetic and an important ceramic material which has enormous applications in various fields like electric, magnetic, electronics, microwave devices, catalysts, transformers cores, power conversions, high frequency applications in telecommunications, magnetically control drug delivery system, for multilayer inductor applications, etc [1][2][3][4][5][6][7]. The nanoferrite properties can be easily adjustable, controllable to a great extent by choosing proper preparation methods and suitable doping with divalent, trivalent and rare earth ions [8][9][10]. Different cation substitutions can distribute into the voids of the parent crystal structure and can alter many properties of nanoferrites like DC resistivity, mobility of the charge, desire magnetization, activation energy, Curie temperature and dielectric losses.…”

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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“…The changes in physical and chemical properties of ion substituted spinel ferrites arise from the ability of these compounds to distribute the cations between the available A-sites (tetrahedral) and B-sites (octahedral) [34][35][36]. Several cations have been used by many researchers in order to improve the electrical and magnetic properties of manganese ferrites [37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis and characterizations of Ti substituted Mn-ferrites

Mostafa

Hessien

Shaltout

2012

Journal of Alloys and Compounds

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“…[12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] However, the efforts towards understanding the effect of the substitution of rare earth (R) ions in spinel oxides are meager. Engineering the materials and development of devices for high frequency applications based on nickel ferrites is clearly dependent upon the fundamental knowledge of electrical behavior of these materials.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, AC impedance and DC electrical conductivity characteristics of NiFe2-xGdxO4 (x = 0, 0.05 and 0.075)

Bharathi¹,

Markandeyulu

Ramana³

2012

AIP Advances

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The structure and electrical characteristics of Gd doped Ni ferrite materials, namely NiFe1.95Gd0.05O4 and NiFe1.925Gd0.075O4, are reported to demonstrate their improved electrical properties compared to that of pure NiFe2O4. NiFe1.95Gd0.05O4 and NiFe1.925Gd0.075O4 compounds crystallize in the cubic inverse spinel phase with a very small amount of GdFeO3 additional phase while pure NiFe2O4 crystallize in inverse spinel phase without any impurity phase. The back scattered electron imaging analysis indicate the primary and secondary formation in NiFe1.95Gd0.05O4 and NiFe1.925Gd0.075O4 compounds. Atomic force microscopy measurements indicate that the bulk grains are ∼2-5 micron size while the grain boundaries are thin compared to bulk grains. Impedance spectroscopic analysis at different temperature indicates the different relaxation mechanisms and their variation with temperature, bulk grain and grain-boundary contributions to the electrical conductivity (Rg) and capacitance (Cg) of these materials. The conductivity in pure NiFeO4 is found to be predominantly due to intrinsic bulk contribution (Rg=213 kΩ and Cg=4.5 x 10-8 F). In the case of NiFe1.95Gd0.05O4 and NiFe1.925Gd0.075O4 compounds, grain and grain-boundary contributions to the conductivity are clearly observed. The DC conductivity values (at 300 K) of NiFe2O4, NiFe1.95Gd0.05O4 and NiFe1.925Gd0.075O4 compounds are found to be 1.06 x 10-7 Ω-1 cm-1, 5.73 x 10-8 Ω-1 cm-1 and 1.28 x 10-8 Ω-1 cm-1 respectively.

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Influence of Nd3+ substitution on structural, electrical and magnetic properties of nanocrystalline nickel ferrites

Cited by 92 publications

References 52 publications

Dielectric Response of Nix Zn1-x Al Fe O4 Nanoferrites

Dielectric Response of Nix Zn1-x Al Fe O4 Nanoferrites

Hydrothermal synthesis and characterizations of Ti substituted Mn-ferrites

Microstructure, AC impedance and DC electrical conductivity characteristics of NiFe2-xGdxO4 (x = 0, 0.05 and 0.075)

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