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

Journal Article · Sun Sep 15 00:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-019-5051-2· OSTI ID:22922885

Osman, Nadir S. E.,; Moyo, Thomas ^[1]

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1. University of KwaZulu-Natal, School of Chemistry and Physics, Westville campus (South Africa)

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.

• OSTI ID: 22922885
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 32, Issue 9; Conference: ICSM2018: 6. International Conference on Superconductivity and Magnetism, Antalya (Turkey), 29 Apr - 4 May 2018; Other Information: Copyright (c) 2019 Springer Science+Business Media, LLC, part of Springer Nature; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ANNEALING
COBALT COMPOUNDS
FERRITES
FOURIER TRANSFORMATION
HYSTERESIS
INFRARED SPECTRA
IRON 57
MAGNETIC FIELDS
MAGNETIZATION
MANGANESE COMPOUNDS
MOESSBAUER SPECTROMETERS
NANOPARTICLES
SCANNING ELECTRON MICROSCOPY
STRONTIUM COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION