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Open AccessArticle

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

1
Department of Applied Physics, National Pingtung University, Pingtung County 90003, Taiwan
2
Research Institute of Physics, Southern Federal University, Rostov-on-Don 344090, Russia
3
Department of Chemical and Materials Engineering, Southern Taiwan University of Science and Technology, Tainan city 710, Taiwan
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(9), 1888; https://doi.org/10.3390/nano10091888
Received: 1 September 2020 / Revised: 12 September 2020 / Accepted: 17 September 2020 / Published: 21 September 2020
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. View Full-Text
Keywords: magnetite nanoparticles; MCD spectroscopy; size effect; thermal decomposition; synthesis conditions magnetite nanoparticles; MCD spectroscopy; size effect; thermal decomposition; synthesis conditions
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MDPI and ACS Style

Spivakov, A.; Lin, C.-R.; Chang, Y.-C.; Wang, C.-C.; Sarychev, D. Magnetic and Magneto-Optical Oroperties of Iron Oxides Nanoparticles Synthesized under Atmospheric Pressure. Nanomaterials 2020, 10, 1888.

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