Formation of magnetic microstructure of the nanosized NiFe2O4 synthesized via solid-state reaction

Author:

Zák T.1,Cosovic V.2,Cosovic A.3,David B.1,Talijan N.2,Zivkovic D.4

Affiliation:

1. Institute of Physics of Materials AS CR, Brno, Czech Republic

2. Institute of Chemistry, Technology and Metallurgy, Belgrade

3. Institute for Technology of Nuclear and Other Mineral Raw Materials, Belgrade

4. Technical Faculty, Bor

Abstract

Magnetic NiFe2O4 structure formation was studied through structural, compositional and magnetic characterization of obtained reaction products of a simple, high yielding and low-cost solid-state reaction. Initial annealing of the starting oxides mixture at 700?C did not allow us to observe formation of the desired magnetic phase. In contrast, subsequent thermomagnetic measurements up to 800?C indicated the considerable increase of the magnetic moment, which can be reasonably assigned to the changes in phase composition and formation of magnetic NiFe2O4 structure during the heating cycle of measurements. Nanosized NiFe2O4 phase formation has been confirmed by the following XRD and MS phase analyses and its nanocrystalline structure by XRD and SEM/TEM techniques. The obtained hysteresis loop taken after TM measurements suggest the increased volume of magnetically active material and thus additionally support the previous findings.

Publisher

National Library of Serbia

Subject

Materials Chemistry,Metals and Alloys,Condensed Matter Physics,Ceramics and Composites

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