Naslov
Synthesis, structural characterization and magnetic properties of iron boride nanoparticles with or without silicon dioxide coating

Autori
Mustapić, Mislav ; Pajić, Damir ; Novosel, Nikolina ; Babić, Emil ; Zadro, Krešo ; Cindrić, Marina ; Horvat, Joseph ; Skoko, Željko ; Bijelić, Mirjana ; Shcherbakov, Andrey

Izvornik
Croatica chemica acta (0011-1643) 83 (2010), 3; 275-282

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Fe-B ; Fe-Co-B ; SiO2 coating ; magnetic nanoparticles ; amorphous alloy

Sažetak
Nanoparticles of iron boride (Fe2B, Fe2B coated in SiO2, FexCo2-xB coated in SiO2) were sythesized 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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

POVEZANOST RADA