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Mössbauer Spectroscopic Studies of NiZn Ferrite Prepared by the Sol–Gel Method |
Journal of Magnetics, Volume 20, Number 3, 30 Sep 2015, Pages 246-251 |
Mohammad Niyaifar * (Department of Physics, Ahvaz Branch, Islamic Azad University), Hory Mohammadpour (Department of Physics, Ahvaz Branch, Islamic Azad University), Anselmo F. R. Rodriguez (Universidade Federal do Acre) |
Abstract |
This study was aimed to study the effect of Zn content on the hyperfine parameters and the structural variation of Ni1-xZnxFe2O4 for x = 0, 0.2, 0.4, 0.6, and 0.8. To achieve this, a sol–gel route was used for the preparation of samples and the obtained ferrites were investigated by X-ray diffraction, scanning electron microscopy, and Mössbauer spectroscopy. The formation of spinel phase without any impurity peak was identified by X-ray diffraction of all the samples. Moreover, the estimated crystallite size by X-ray line broadening indicates a decrease with increasing Zn content. This result was in agreement with the scanning electron microscopy result, indicating the reduction in grain growth with further zinc substitution. The room-temperature Mössbauer spectra show that the hyperfine fields at both the A and B sites decreased with increasing Zn content; however, the rate of reduction is not the same for different sites. Moreover, the best fit parameter showed that the quadrupole splitting values of B site increased from the pure nickel ferrite to the sample with x = 0.8.
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Keywords: Ni–Zn ferrite; Mössbauer spectroscopy; scanning electron microscopy; sol–gel |
DOI: http://dx.doi.org/10.4283/JMAG.2015.20.3.246 |
Full Text: PDF |
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