Mössbauer, Magnetization and Structure Characterizations of the Annealed Sr{sub 1/3}Mn{sub 1/3}Co{sub 1/3}Fe{sub 2}O{sub 4} Ferrite Nanoparticles

Sr{sub 1/3}Mn{sub 1/3}Co{sub 1/3}Fe{sub 2}O{sub 4} ferrite nanoparticles were synthesized by glycol thermal technique. The structure and morphology of the Nano ferrites were studied by X-ray powder diffraction, Fourier transform infrared FTIR, high-resolution scanning electron microscopy, and high-r...

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Bibliographic Details
Published in:Journal of superconductivity and novel magnetism 2019-09, Vol.32 (9)
Main Authors: Osman, Nadir S. E., Moyo, Thomas
Format: Article
Language:English
Subjects:
ANNEALING
COBALT COMPOUNDS
FERRITES
FOURIER TRANSFORMATION
HYSTERESIS
INFRARED SPECTRA
IRON 57
MAGNETIC FIELDS
MAGNETIZATION
MANGANESE COMPOUNDS
MOESSBAUER SPECTROMETERS
NANOPARTICLES
NANOSCIENCE AND NANOTECHNOLOGY
SCANNING ELECTRON MICROSCOPY
STRONTIUM COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
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Summary:Sr{sub 1/3}Mn{sub 1/3}Co{sub 1/3}Fe{sub 2}O{sub 4} ferrite nanoparticles were synthesized by glycol thermal technique. The structure and morphology of the Nano ferrites were studied by X-ray powder diffraction, Fourier transform infrared FTIR, high-resolution scanning electron microscopy, and high-resolution transmission electron microscopy. The induced internal strains were investigated by Williamson plots. The results show mono-dispersive property of the sample and particle sizes that increase with increasing annealing temperature, T{sub A}. The magnetic hyperfine fields were found to be sensitive to T{sub A} as seen from room temperature {sup 57}Fe Mössbauer measurements. The magnetic hysteresis loops were performed in external magnetic field of up to 50 kOe. Room temperature M − H loops showed that the coercive fields increased to a maximum at T{sub A} of 500 °C and then decreased thereafter. Significant increases in coercive fields were observed at a measuring temperature of 4 K. Distortions in the hysteresis loops at 4 K were observed where thermal annealing effect appears to induce strong linear correlation between coercive fields and saturation magnetizations.
ISSN:1557-1939
1557-1947