ACTA

Magnetic Interactions between Nanoparticles Formed during Calcination of Ferrihydrite

O. Schneeweiss^a, B. David^a, T. Žák^a, J. Filip^b, J. Tuček^b, R. Zbořil^b, and M. Mašláň^b
^aInstitute of Physics of Materials, AS CR, Žižkova 22, 61662 Brno, Czech Republic
^bDepartments of Physical Chemistry and Experimental Physics, Palacky University, Tr. 17. listopadu 12, 77146 Olomouc, Czech Republic

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Magnetic interactions between nanoparticles of magnetite Fe₃O₄ and α-Fe formed during calcination of ferrihydrite in H₂ at temperatures 533 ÷ 713 K were studied. The detailed phase analysis describes evolution of contents of magnetite and α-Fe. Explanation of an anomalous course of magnetic moment characterized by a local maximum at an early stage of formation of nanoparticles is discussed.

DOI: 10.12693/APhysPolA.118.749
PACS numbers: 75.20.Ck, 75.20.En