Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 324, Issue 24, Pages 4147-4150Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2012.07.023
Keywords
Hydrothermal; Magnetite; Nanocrystals; Superparamagnetic
Funding
- Ministry of Science, Technology and Innovation of Malaysia (MOSTI) for e-Science Fund [0301-02-SF0030]
- Universiti Kebangsaan Malaysia for the Research University Operation Grant [UKM-OUP-NBT-28-124-2010]
- ExxonMobil University Research Grant [STGL-012-2008]
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Magnetite (Fe3O4) nanocrystals were synthesized using a facile hydrothermal method. FeCl2, FeCl3 and NaOH with a molar ratio of 1:2:8 were added into an autoclave and this was followed by heat treatment at elevated temperature (100,150 and 200 degrees C). The produced results show that the average crystallite and the physical size of the resulting Fe3O4 nanocrystals increased with the hydrothermal temperature. The Fe3O4 nanocrystals exhibited superparamagnetic behavior. The saturation magnetization and coercivity of the produced nanocrystals also increased with the hydrothermal temperature. (c) 2012 Elsevier B.V. All rights reserved.
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