ACTA

Fe-Oxide/CeO₂ Composites - Magnetization Curves and Their Analyses Using the Jiles-Atherton Model

M. Nikodým^a, J. Luňáček^a, Y. Jirásková^b, P. Janoš^c, J. Juřica^d, O. Životský^a
^aDepartment of Physics, VŠB - Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava-Poruba, Czech Republic
^bInstitute of Physics of Materials, Academy of Sciences of the Czech Republic, Žižkova 22, 616 62 Brno, Czech Republic
^cFaculty of the Environment, University of Jan Evangelista Purkyně, Králova Výšina 7, 400 96 Ústí nad Labem, Czech Republic
^dRegional Materials Science and Technological Centre, VŠB - Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava-Poruba, Czech Republic

Full Text PDF

The initial mixture of magnetite with 20 vol.% of cerium carbonate is treated at 673 K and 1173 K leading to formation of Fe-oxide/cerium dioxide reactive sorbents. The main interest is devoted to iron-oxide composition and interactions between both oxides mainly influencing the structural and physical magnetic properties. While the morphology did not change markedly, the transformations of initial magnetite into maghemite and/or hematite contributed to changes in magnetic properties measured at 2 K and 300 K. The magnetization curves were analysed using a theoretical Jiles-Atherton approach and discussed in connection with sorbents microstructure.

DOI:10.12693/APhysPolA.137.601
topics: iron oxides/cerium dioxide sorbents, magnetization curves, Jiles-Atherton model