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Cation Distribution Assisted Tuning of Magnetization in Nanosized Magnesium Ferrite

Thanh, N.K. and Loan, T.T. and Duong, N.P. and Anh, L.N. and Nguyet, D.T.T. and Nam, N.H. and Soontaranon, S. and Klysubun, W. and Hien, T.D. (2018) Cation Distribution Assisted Tuning of Magnetization in Nanosized Magnesium Ferrite. Physica Status Solidi (A) Applications and Materials Science, 215 (1): 1700397. ISSN 18626300

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Abstract

The MgFe2O4 nanoparticles are synthesized by combustion method and annealed at different temperatures from 500 to 1000 °C. Magnetic properties, morphology, valence states of iron, crystal structure, and microstructure of the samples are investigated systematically by vibrating sample magnetometer, field emission scanning electron microscope, transmission electron microscopy, X-ray absorption spectroscopy, and synchrotron X-ray diffraction. Cation distribution is determined from synchrotron X-ray diffraction data using Rietveld refinement combined with extended X-ray absorption fine structure spectroscopy. The results indicates that all the samples are phase-pure with crystallite size ranging from 11 to 41 nm. By adjusting the annealing temperature, cation distribution and particle size can be changed, and consequently leading to the change in structure and magnetic properties. The saturation magnetization of the samples are enhanced significantly compared to that of the bulk material. The variation of magnetic properties is discussed based on cation distribution, particle size, valence state, surface effect, and spin canting. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Item Type: Article
Divisions: Faculties > Faculty of Information Technology
Identification Number: 10.1002/pssa.201700397
Uncontrolled Keywords: Crystal microstructure; Crystallite size; Extended X ray absorption fine structure spectroscopy; Ferrite; Ferrites; High resolution transmission electron microscopy; Iron compounds; Magnesium; Magnesium compounds; Magnetic properties; Magnetism; Magnetization; Particle size; Positive ions; Rietveld refinement; Saturation magnetization; Scanning electron microscopy; Synchrotron radiation; Synthesis (chemical); Transmission electron microscopy; X ray absorption fine structure spectroscopy; X ray absorption spectroscopy; X ray diffraction; Annealing temperatures; Cation distributions; Field emission scanning electron microscopes; Magnesium ferrite; Oxidation state; Synchrotron diffraction; Synchrotron x ray diffraction; Vibrating sample magnetometer; Crystal structure
Additional Information: Language of original document: English.
URI: http://eprints.lqdtu.edu.vn/id/eprint/9638

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