Synthesis of non-stoichiometric zinc ferrite for electromagnetic wave absorber applications

•Zn doped Fe3O4 nanopowders of ∼10–20nm are prepared by the M-H method.•The value of Ms decreases with higher Zn doping (beyond x=0.2) to Fe3O4.•The Zn doping also influences the complex permeability of ferrite reducing the fr.•Reflection loss −28.2dB and −22.3dB observed at 1.28 and 1.42GHz respect...

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Bibliographic Details
Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2017-10, Vol.224, p.88-92
Main Author: Seetha Rama Raju, V.
Format: Article
Language:English
Subjects:
Absorbers
Chemical synthesis
Complex permeability
Complex permittivity
Electromagnetic properties
Electromagnetism
Electron microscopy
Ferrimagnetism
Ferrites
Iron oxides
Magnetic measurement
Microwave Hydrothermal method
Nanocrystalline ferrites
Nanocrystals
Permeability
X ray powder diffraction
X-ray diffraction
Zinc ferrites
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Summary:•Zn doped Fe3O4 nanopowders of ∼10–20nm are prepared by the M-H method.•The value of Ms decreases with higher Zn doping (beyond x=0.2) to Fe3O4.•The Zn doping also influences the complex permeability of ferrite reducing the fr.•Reflection loss −28.2dB and −22.3dB observed at 1.28 and 1.42GHz respectively. Zn doped Fe3O4 nanocrystalline powders are prepared by the Microwave Hydrothermal (M-H) method. The synthesized ferrite powders are characterized using Powder X-ray diffraction (XRD), Transmission Electron Microscopy (TEM), and Vibrating Sample Magnetometry (VSM). Nanocrystalline ferrites of ∼10–20nm size are synthesized at a low temperature of 160⁰C after a treatment time of 60min. Magnetization studies show the ferrimagnetic nature of the synthesized samples at room temperature. The electromagnetic properties such as complex permittivity and complex permeability spectra are recorded in the frequency range from 1MHz to 1.8GHz. The calculated reflection loss indicated that these ferrites show a potential application as multiband electromagnetic wave absorbers.
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2017.07.012