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Magnetic and Magneto-Optical Oroperties of Iron Oxides Nanoparticles Synthesized under Atmospheric Pressure

Authors :
Aleksandr Spivakov
Chun-Rong Lin
Yu-Chuan Chang
Cheng-Chien Wang
Dmitriy Sarychev
Source :
Nanomaterials, Vol 10, Iss 9, p 1888 (2020)
Publication Year :
2020
Publisher :
MDPI AG, 2020.

Abstract

Magnetite nanoparticles were synthesized by a simple thermal decomposition process, involving only iron (III) nitrate nonahydrate as a precursor, and hexadecylamine as a solvent and stabilizer at reaction temperatures varied from 200 to 380 °C. The results of the structural analysis showed that the average crystallite size depends on the reaction temperature and increases from 4.8 to 13.3 nm. The behavior of the coercivity indicates that all synthesized samples are single domain; herewith, it was found that the critical size corresponding to the transition to the superparamagnetic state at room temperature is about 9 nm. The effect of the reaction temperature on changes in the saturation magnetization was studied. It was found that the size effect in the MCD spectra is observed for the IVCT transition and one ISCT transition, and the influence of the reaction temperature on the change in the MCD spectra was discussed.

Details

Language :
English
ISSN :
20794991
Volume :
10
Issue :
9
Database :
Directory of Open Access Journals
Journal :
Nanomaterials
Publication Type :
Academic Journal
Accession number :
edsdoj.8a582ab5c4e4733aced5d6c2779f799
Document Type :
article
Full Text :
https://doi.org/10.3390/nano10091888