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

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: ,  ,  ,   and    
Open Access
|Jun 2016
Figures & tables

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.

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.

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°.

Table 1

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
Fig. 4

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.

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.

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.

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.

Fig. 9

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

Table 2

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
Fig. 10

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.

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.

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.

DOI: https://doi.org/10.1515/msp-2016-0046 | Journal eISSN: 2083-134X (formerly 2083-124X) | 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
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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