Journal
CENTRAL EUROPEAN JOURNAL OF CHEMISTRY
Volume 8, Issue 3, Pages 633-638Publisher
VERSITA
DOI: 10.2478/s11532-010-0037-8
Keywords
Sonochemistry; Mn3O4; Nanomaterials; Coercive Field; Chemical Synthesis
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Funding
- Fatih University, Research Project Foundation [P50020803-2]
- Knut and Alice Wallenberg's Foundation
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We report on the synthesis of Mn3O4 nanoparticles (NPs) using a novel sonochemical method without requiring any pH adjustment. Synthesized material was identified as tetragonal hausmannite crystal structure model of Mn3O4 from XRD analysis. Crystallite size was estimated from x-ray line profile fitting to be 17 +/- 5 nm. FTIR analysis revealed stretching vibrations of metal ions in tetrahedral and octahedral coordination confirming the crystal structure. TEM analysis revealed a dominantly cubic morphology of NPs with an average size of similar to 20 nm. Magnetic evaluation revealed a blocking temperature, T-B of 40 K above which the material behaves paramagnetic. Asymmetric coercive field is attributed to the interaction between ferromagnetic Mn3O4 and antiferromagnetic Mn oxide at the surface of nanoparticles.
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