Synthesis, Structural Characterization and Magnetic Properties of Iron Boride Nanoparticles with or without Silicon Dioxide Coating

Mustapić, Mislav and Pajić, Damir and Novosel, Nikolina and Babić, Emil and Zadro, Krešo and Cindrić, Marina and Horvat, Joseph and Skoko, Željko and Bijelić, Mirjana and Shcherbakov, Andrey (2010) Synthesis, Structural Characterization and Magnetic Properties of Iron Boride Nanoparticles with or without Silicon Dioxide Coating. Croatica Chemica Acta, 83 (3). pp. 275-282. ISSN 0011-1643

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Abstract

Nanoparticles of iron boride (Fe2B, Fe2B coated in SiO2, FexCo2−xB coated in SiO2) were synthesized using the reduction of metal ions by sodium borohydride. X-ray diffraction confirms the amorphicity of the coated compounds and scanning electron microscope imaging revealed the nanoparticulated structure of all compounds. The splitting between zero-field-cooled and field-cooled temperature dependent magnetization curves point to the blocking of superparamagnetic particles magnetization. Magnetic hysteresis loops are however consistent with the combined effects of blocked superparamagnetic and ferromagnetic (multidomain) particles. The observed quite complex magnetic behaviour is in accordance with structural studies, where additional phases and broad distribution of particle sizes were identified.

Item Type: Article
Keywords: Fe-B, Fe-Co-B, SiO2 coating, magnetic nanoparticles, amorphous alloy
Date: 2010
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Faculty of Science > Department of Chemistry
Publisher: Hrvatsko kemijsko društvo
Related URLs:
Depositing User: mag. bibl. Ana Šafran
Date Deposited: 09 May 2014 10:37
Last Modified: 09 May 2014 10:37
URI: http://digre.pmf.unizg.hr/id/eprint/1091

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