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

Nanoparticles of iron boride (Fe^sub 2^B, Fe^sub 2^B coated in SiO^sub 2^, Fe^sub x^Co^sub 2-x^B coated in SiO^sub 2^) 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...

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Veröffentlicht in:Croatica chemica acta 2010-10, Vol.83 (3), p.275
Hauptverfasser: Mustapic, Mislav, Pajic, Damir, Novosel, Nikolina, Babic, Emil, Zadro, Kreso, Cindric, Marina, Horvat, Joseph, Skoko, Zeljko, Bijelic, Mirjana, Shcherbakov, Andrey
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container_title Croatica chemica acta
container_volume 83
creator Mustapic, Mislav
Pajic, Damir
Novosel, Nikolina
Babic, Emil
Zadro, Kreso
Cindric, Marina
Horvat, Joseph
Skoko, Zeljko
Bijelic, Mirjana
Shcherbakov, Andrey
description Nanoparticles of iron boride (Fe^sub 2^B, Fe^sub 2^B coated in SiO^sub 2^, Fe^sub x^Co^sub 2-x^B coated in SiO^sub 2^) 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. [PUBLICATION ABSTRACT]
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source DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals
subjects Magnetism
Nanoparticles
Silica
title Synthesis, Structural Characterization and Magnetic Properties of Iron Boride Nanoparticles with or without Silicon Dioxide Coating
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