Structural and Magnetic Properties of Nanocrystalline Lithium–Zinc Ferrite Synthesized by Microwave-Induced Glycine–Nitrate Process

In this study, nanocrystalline Li–Zn ferrites with the chemical composition Li 0.5 Zn x Fe 2.5− x O 4 (where x =0, 0.1,0.2,0.3,0.4,0.5) were synthesized by the glycine–nitrate process using glycine as a fuel, nitrate as an oxidizer and microwave oven as a heat source. The combustion reaction was stu...

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Bibliographic Details
Published in:Journal of superconductivity and novel magnetism 2014-06, Vol.27 (6), p.1483-1490
Main Authors: Borhan, N., Gheisari, K.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Combustion
Combustion synthesis
Condensed Matter Physics
Diffraction
Ferrite
Magnetic Materials
Magnetism
Nanocrystals
Original Paper
Physics
Physics and Astronomy
Scanning electron microscopy
Strongly Correlated Systems
Superconductivity
X-rays
Zinc
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Summary:In this study, nanocrystalline Li–Zn ferrites with the chemical composition Li 0.5 Zn x Fe 2.5− x O 4 (where x =0, 0.1,0.2,0.3,0.4,0.5) were synthesized by the glycine–nitrate process using glycine as a fuel, nitrate as an oxidizer and microwave oven as a heat source. The combustion reaction was studied by differential thermal analysis and thermogravimetry. The experimentally determined combustion reaction is extremely exothermic and it occurs at 170  ∘ C. The as-synthesized powders were characterized by X-ray diffraction technique. X-ray diffraction data shows that nanocrystalline Li–Zn ferrite powders with a spinel structure have been formed successfully in all samples. Morphological studies using scanning electron microscopy and field emission scanning electron microscopy show agglomerated clusters with a lot of pores attributed to the large amount of gases released during the combustion synthesis with the particle size of 20–40 nm. The magnetic measurements on the as-synthesized powders and compacted samples were carried out using a vibrating sample magnetometer and an inductance/capacitance/resistance meter, respectively. Saturation magnetization increases with the increase in zinc concentration up to x =0.2 and then it decreases with the increase in the zinc content. In addition, maximum magnetic permeability also obtained for the sample with x =0.2 at different frequencies.
ISSN:1557-1939
1557-1947
DOI:10.1007/s10948-013-2450-7