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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
materials science
New Mg
0.5
Co
x
Zn
0.5-x
Fe
2
O
4
nano-ferrites: Structural elucidation and electromagnetic behavior evaluation
Current Applied Physics, Volume 14, No. 5, Year 2014
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Description
In this work cobalt substituted magnesium zinc nanocrystalline spinel ferrites having general formula Mg0.5CoxZn 0.5-xFe2O4 where x = 0.1, 0.2, 0.3, 0.4, 0.5 were synthesized using micro-emulsion technique. The Co substituted samples annealed at 700 °C and characterized by various characterization techniques, such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), dielectric measurements and vibrating sample magnetometer (VSM). XRD analysis confirmed single phase spinel structure and the crystalline size calculated by Scherrer's formula found to be in 21.38-45.5 nm range. The lattice constant decreases as substitution of Co is increased. The decrease in lattice constant is attributed to the smaller ionic radius of cobalt as compared to zinc ion. The FTIR spectra reveled two prominent frequency bands in the wave number range 400-600 cm-1 which confirm the cubic spinel structure and completion of chemical reaction. The dielectric parameters were observed to decrease with the increased Co contents. The peaking behavior was observed beyond 1.8 GHz. The frequency dependent dielectric properties of all these nanomaterials have been explained qualitatively in accordance with Koop's phenomenological theory. Magnetic studies revealed that the coercivity (H c) attains maximum value of 818 Oe at ∼21 nm. The increasing trend of magnetic parameters (coercivity and retentivity) is consistent with crystallinity. The crystallite size is small enough to attain considerable signal to noise ratio in high density recording media. The optimized magnetic parameters suggest that the material with composition Mg0.5Co 0.5Fe2O4 may have potential applications in high density recording media. © 2014 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Lodhi, Maria Yousuf
Pakistan, Bahawalpur
The Islamia University of Bahawalpur
Mahmood, Khalid
Pakistan, Bahawalpur
The Islamia University of Bahawalpur
Mahmood, Azhar
Pakistan, Bahawalpur
The Islamia University of Bahawalpur
Malik, Huma
Pakistan, Bahawalpur
The Islamia University of Bahawalpur
Warsi, Muhammad Farooq
Pakistan, Bahawalpur
The Islamia University of Bahawalpur
Shakir, Imran
Saudi Arabia, Riyadh
King Saud University
Asghar, Muhammad Hammad
Pakistan, Bahawalpur
The Islamia University of Bahawalpur
Khan, Muhammad Azhar
Pakistan, Bahawalpur
The Islamia University of Bahawalpur
Statistics
Citations: 120
Authors: 8
Affiliations: 2
Identifiers
Doi:
10.1016/j.cap.2014.02.021
ISSN:
15671739
Study Design
Phenomenological Study
Study Approach
Qualitative