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Metals 2019, 9(2), 222;

Effect of Iron Impurities on Magnetic Properties of Nanosized CeO2 and Ce-Based Compounds

CEITEC IPM, Institute of Physics of Materials, AS CR, Zizkova 22, 616 62 Brno, Czech Republic
Faculty of the Environment, University of Jan Evangelista Purkyne, Kralova Vysina 7, 400 96 Usti nad Labem, Czech Republic
Department of Physics, VSB-Technical University of Ostrava, 17.listopadu 15, 708 33 Ostrava-Poruba, Czech Republic
Institute of Physics, University of Silesia in Katowice, Pułku Piechoty 1A, 41-500 Chorzów, Poland
Author to whom correspondence should be addressed.
Received: 17 December 2018 / Revised: 1 February 2019 / Accepted: 9 February 2019 / Published: 13 February 2019
(This article belongs to the Special Issue Rare Earth Compounds)
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CeO2 samples prepared by three technological procedures from the same cerium source, namely cerium (III) nitrate hexahydrate, are studied from the viewpoint of structure, chemical and phase composition, and micro- and macro-magnetic properties. The scanning and transmission electron microscopies completed by energy-dispersive X-ray (EDX) analysis yield nano-structural natures and homogenous chemical compositions of the ceria samples, confirmed also by X-ray diffraction. The diamagnetic, paramagnetic, and ferromagnetic phases in all samples follow from an analysis of the room- and low-temperature measurements of hysteresis loops. Iron impurities in ppm amounts are clearly detected by 57Fe Mössbauer spectrometry not only in the ceria samples but also in the selected input chemicals used for their preparation. This contributes to the explanation of the magnetic behaviour of nanosized ceria. View Full-Text
Keywords: CeO2; microstructure; magnetic properties; Mössbauer spectrometry CeO2; microstructure; magnetic properties; Mössbauer spectrometry

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Jiraskova, Y.; Bursik, J.; Janos, P.; Lunacek, J.; Chrobak, A.; Zivotsky, O. Effect of Iron Impurities on Magnetic Properties of Nanosized CeO2 and Ce-Based Compounds. Metals 2019, 9, 222.

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