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

M. Bhuvaneswari
M. Bhuvaneswari
, 
S. Sendhilnathan
S. Sendhilnathan
, 
M. Kumar
M. Kumar
, 
R. Tamilarasan
R. Tamilarasan
 et 
N.V. Giridharan
N.V. Giridharan
   | 18 juin 2016
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Article Category: Research Article
Publié en ligne: 18 juin 2016
Pages: 344 - 353
Reçu: 06 août 2015
Accepté: 24 févr. 2016
DOI: https://doi.org/10.1515/msp-2016-0046
Mots clés
© Wroclaw University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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
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Materials Sciences, other, Nanomaterials, Functional and Smart Materials, Materials Characterization and Properties
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