Synthesis and Magnetic Properties of Nanostructured Maghemite
- 1 August 1997
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 12 (8) , 2175-2182
- https://doi.org/10.1557/jmr.1997.0291
Abstract
Nanocrystalline maghemite, γ–Fe2O3, can be synthesized in a microwave plasma using FeCl3 or Fe3(CO)12 as the precursor. Electron microscopy revealed particle sizes in the range of 5 to 10 nm. In general, this material is superparamagnetic. The magnetic properties are strongly dependent on the precursor. In both cases the production process leads to a highly disordered material with the consequence of a low magnetization. The assumption of a disordered structure is also supported by electron energy loss (EEL) and Mössbauer spectroscopy. The structure of this material shows a nearly identical number of cations on tetrahedral and octahedral lattice sites.Keywords
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