Тип публикации: статья из журнала
Год издания: 2021
Идентификатор DOI: 10.1016/j.cap.2021.02.013
Ключевые слова: ft-ir spectra, greigite, magnetic circular dichroism, mössbauer effect, surfactants, thermal decomposition
Аннотация: Greigite (Fe3S4) nanoparticles (NPs) were fabricated by the thermal decomposition method using two different surfactants: oleylamine (OLA) and 1-hexadecylamine (HDA). In both cases, the synthesized NPs were characterized as the Fe3S4 nanocrystals with minor inclusions of Fe9S11 phase. FT-IR spectroscopy and thermo-gravimetric analyПоказать полностьюsis allow concluding about OLA or HDA shells covering magnetic core of NPs. Mössbauer spectra has revealed deviations of iron ions distribution among crystal positions from that presented in literature for pure greigite. In accordance with these deviations, the pronounce changes are observed in the magnetic circular dichroism (MCD) spectra which manifest themselves as the spectrum shift to higher energies of electromagnetic waves and redistribution of the MCD maximum intensities. These effects are associated with a change in the density of electronic states in the samples due to the redistribution of iron ions between octahedral and tetrahedral positions in nanocrystals under the influence of surfactants. © 2021 Korean Physical Society
Журнал: Current Applied Physics
Выпуск журнала: Vol. 25
Номера страниц: 55-61
ISSN журнала: 15671739
Издатель: Elsevier B.V.