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Synthesis, investigation on structural and electrical properties of cobalt doped Mn–Zn ferrite nanocrystalline powders

Materials Science-Poland
Volume 34 (2016): Issue 2 (June 2016)
By:
Open Access
|Jun 2016

Figures & Tables

Fig. 1

Flow chart for the preparation of CoxMnyZnyFe2O4 (x = 0.1, 0.5, 0.9 and y = 0.45, 0.25, 0.05) nanopowders.
Flow chart for the preparation of CoxMnyZnyFe2O4 (x = 0.1, 0.5, 0.9 and y = 0.45, 0.25, 0.05) nanopowders.

Fig. 2

X-ray diffraction patterns for CoxMnyZnyFe2O4 with (a) x = 0.1, y = 0.45 (b) x = 0.5, y = 0.25 and (c) x = 0.9, y = 0.05.
X-ray diffraction patterns for CoxMnyZnyFe2O4 with (a) x = 0.1, y = 0.45 (b) x = 0.5, y = 0.25 and (c) x = 0.9, y = 0.05.

Fig. 3

The magnified XRD patterns of CoxMnyZnyFe2O4 (x = 0.1, 0.5, 0.9 and y = 0.45, 0.25, 0.05) nanopowders in the range of 30° to 35°.
The magnified XRD patterns of CoxMnyZnyFe2O4 (x = 0.1, 0.5, 0.9 and y = 0.45, 0.25, 0.05) nanopowders in the range of 30° to 35°.

Fig. 4

Variation of lattice constants (a, b), tetrogonality (c) and FWHM (d) with cobalt content for the Mn–Zn ferrite nanopowders.
Variation of lattice constants (a, b), tetrogonality (c) and FWHM (d) with cobalt content for the Mn–Zn ferrite nanopowders.

Fig. 5

SEM micrographs of the Mn–Zn ferrite nanopowders doped with cobalt.
SEM micrographs of the Mn–Zn ferrite nanopowders doped with cobalt.

Fig. 6

W-H plot of CoxMnyZnyFe2O4 with (a) x = 0.1, y = 0.45 (b) x = 0.5, y = 0.25 and (c) x = 0.9, y = 0.05.
W-H plot of CoxMnyZnyFe2O4 with (a) x = 0.1, y = 0.45 (b) x = 0.5, y = 0.25 and (c) x = 0.9, y = 0.05.

Fig. 7

Variation of dielectric constant with frequency for Cox MnyZnyFe2O4 with (a) x =0.1, y = 0.45 (b) x =0.5, y =0.25 and (c) x =0.9, y = 0.05.
Variation of dielectric constant with frequency for Cox MnyZnyFe2O4 with (a) x =0.1, y = 0.45 (b) x =0.5, y =0.25 and (c) x =0.9, y = 0.05.

Fig. 8

Variation of dielectric loss with frequency for CoxMnyZnyFe2O4 with (a) x = 0.1, y = 0.45 (b) x = 0.5, y = 0.25 and (c) x = 0.9, y = 0.05.
Variation of dielectric loss with frequency for CoxMnyZnyFe2O4 with (a) x = 0.1, y = 0.45 (b) x = 0.5, y = 0.25 and (c) x = 0.9, y = 0.05.

Fig. 9

Variation of dielectric constant with cobalt content for the Mn–Zn ferrite nanopowders.
Variation of dielectric constant with cobalt content for the Mn–Zn ferrite nanopowders.

Fig. 10

Variation of dielectric loss with cobalt content for the Mn–Zn ferrite nanopowders.
Variation of dielectric loss with cobalt content for the Mn–Zn ferrite nanopowders.

Fig. 11

Variation of AC conductivity with frequency for Cox MnyZnyFe2O4 with (a) x = 0.1, y = 0.45 (b) x = 0.5, y = 0.25 and (c) x = 0.9, y = 0.05.
Variation of AC conductivity with frequency for Cox MnyZnyFe2O4 with (a) x = 0.1, y = 0.45 (b) x = 0.5, y = 0.25 and (c) x = 0.9, y = 0.05.

Fig. 12

Cole-Cole plot for CoxMnyZnyFe2O4 with (a) x = 0.1, y = 0.45 (b) x = 0.5, y = 0.25 and (c) x = 0.9, y = 0.05.
Cole-Cole plot for CoxMnyZnyFe2O4 with (a) x = 0.1, y = 0.45 (b) x = 0.5, y = 0.25 and (c) x = 0.9, y = 0.05.

Fig. 13

The FT-IR patterns of CoxMnyZnyFe2O4 with (a) x = 0.1, y = 0.45 (b) x = 0.5, y = 0.25 and (c) x = 0.9, y = 0.05.
The FT-IR patterns of CoxMnyZnyFe2O4 with (a) x = 0.1, y = 0.45 (b) x = 0.5, y = 0.25 and (c) x = 0.9, y = 0.05.

Dielectric constants at different frequencies_

SamplesDielectric constant
at 1kHzat 10 kHzat 100 kHz
Co0:1Mn0:45Zn0:45Fe2O418785.85729017.06184599.6196
Co0:5Mn0:25Zn0:25Fe2O415679.63185982.78643769.3166
Co0:9Mn0:05Zn0:05Fe2O48877.47883644.9873422.8054

Lattice constants, strain and crystallite size of CoxMnyZnyFe2O4_

CoxMnyZnyFe2O4Lattice parameter [Å ]Volume of the unit cell [Å3]Strain [∊]Crystallite size [nm]
abc
x = 0.1, y = 0.455.5565.5569.823303.200.0015335
x = 0.5, y = 0.505.5645.56410.402322.09–0.00070437
x = 0.9, y = 0.055.5085.50810.279311.81–0.00085128
DOI: https://doi.org/10.1515/msp-2016-0046 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
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Language: English
Page range: 344 - 353
Submitted on: Aug 6, 2015
Accepted on: Feb 24, 2016
Published on: Jun 18, 2016
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
nanoferrites,
cobalt substituted Mn–Zn ferrite,
Co-precipitation,
magnetic nanoparticle,
dielectric constant
Related subjects:
Materials sciences,
Materials sciences, other,
Nanomaterials,
Functional and smart materials,
Materials characterization and properties

© 2016 M. Bhuvaneswari, S. Sendhilnathan, M. Kumar, R. Tamilarasan, N.V. Giridharan, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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