Document Details
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Document Type |
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Article In Journal |
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Document Title |
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Structural and magnetic properties of magnesium ferrite nanoparticles prepared via EDTA-based sol-gel reaction Structural and magnetic properties of magnesium ferrite nanoparticles prepared via EDTA-based sol-gel reaction |
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Subject |
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physics |
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Document Language |
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English |
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Abstract |
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Magnesium ferrite (MgFe2O4) nanoparticles have been prepared, for the first time, by ethylene diamine
tetraacetic acid (EDTA)-based sot-get combustion method. The prepared ferrite system is calcined at
400, 500 and 600 degrees C. Thermo-gravimetric and differential thermal analysis (TGA-DTA), X-ray
diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, high resolution transmission electron
microscopy (HRTEM) and vibrating sample magnetometry (VSM) were applied for elucidating the
structural and magnetic properties of the prepared system. XRD patterns revealed that the prepared
system have two spinet MgFe2O4 structures, namely cubic and tetragonal phases that are dependent
on calcination temperature (T-c). The crystallite sizes varied from 8.933 to 41.583 nm, and from 1.379
to 292.565 nm for the cubic and tetragonal phases respectively depending on T-c. The deduced lattice
parameters for the cubic and (tetragonal) systems are a=8.368, 8.365 and 8.377 and (a=7011. 5.922,
5.908 and c=6.622, 8.456, 8.364) angstrom at T-c=400, 500 and 600 degrees C respectively. While the
cation distribution of the cubic phase is found to be mixed spinel and T-c-dependent, it is an inverse
spinel in the tetragonal phase where the Fe3+ ions occupy both the tetrahedral A- and octahedral Bsites
in almost equal amount; the Mg2+ ions are found to occupy only the B-sites. The HRTEM and
selected-area electron diffraction (SAED) revealed the detailed morphology of the nanoparticles, and
confirmed their crystalline spinel structure. VSM indicated the existence of an appreciable fraction of
superparamagnetic particles at room temperature, with pure superparamagnetic behavior observed for
samples calcined at 400 degrees C. Besides, the magnetic properties are found to change by thermal
treatment as a result of the varied phase concentration, cation distribution and lattice parameters. Thus,
the new synthesis route used in this study by applying EDTA as an organic precursor for preparing
MgFe2O4 nanoparticles at rather low temperatures proved to be efficient in obtaining nanoparticles with
favorable structural and magnetic properties. Such properties would qualify them for several potential
applications including e.g. in hyperthermia treatment, as contrast agents in magnetic resonance
imaging (MRI), and in ferroelastomers technology |
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ISSN |
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0304-8853 |
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Journal Name |
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JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS |
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Volume |
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379 |
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Issue Number |
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12 |
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Publishing Year |
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1435 AH
2015 AD |
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Article Type |
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Article |
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Added Date |
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Monday, August 21, 2017 |
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Researchers
| S.I Hussein | Hussein, S.I | Investigator | Doctorate | |
| A.S Elkady | Elkady, A.S | Researcher | Doctorate | elkady8@gmail.com |
| M.M Rashad | Rashad, M.M | Researcher | Doctorate | |
| A.G Mostafa | Mostafa, A.G | Researcher | Doctorate | |
| r,m Megahid | Megahid, r.m | Researcher | Doctorate | |
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