Abstract
Magnetite (Fe3O4), with an inverse spinel structure, grows naturally in octahedral shape with eight equivalent {111} crystallographic planes. Here we demonstrated the successful morphology tuning of Fe 3O4 microcrystal from the dominant octahedral shape to planar microplate shape by a facile hydrothermal method. The top and bottom surfaces of Fe3O4 microplates obtained under strongly alkaline and reductive conditions were bounded by {111} facets, and the formation of {111} twin planes was thought to be accountable for the anisotropic morphologies. The obtained Fe3O4 microplates delivered saturation magnetization (Ms) of 96.6 emu/g and coercivity (H c) of 50 Oe. We also measured the electromagnetic properties of Fe3O4 microplates for possible applications as filler for electromagnetic wave absorption coatings.
Original language | English (US) |
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Pages (from-to) | 161-165 |
Number of pages | 5 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 361 |
DOIs | |
State | Published - Jun 2014 |
Funding
This work was supported by the Fundamental Research Funds for the Central Universities (No. HIT.BRETIII.201203 ). K.H. was supported by Ellen Williams Fellowship , and also thanks the use of facilities at NispLab of the Maryland NanoCenter. F.X.M. thanks Zeng-Quan Wang for electromagnetic properties measurement.
Keywords
- 2D material
- Electromagnetic property
- Hydrothermal synthesis
- Magnetite
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics