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Synthesis of α-Fe2O3 nanobelts and nanoflakes by thermal oxidation and study to their magnetic properties |
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| Authors: | Xinghua SuChengshou Yu Chengwen Qiang |
| Institution: | a School of Materials Science and Engineering, Chang’an University, Xi’an 710061, China b Department of Materials Science and Engineering, Lanzhou University, Lanzhou 730000, China c China and Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, China |
| Abstract: | α-Fe2O3 nanobelts and nanoflakes have been successfully synthesized by oxidation of iron-coated ITO glass in air. The X-ray diffraction, Raman spectrum and scanning electron microscopy are carried out to characterize the nanobelts and nanoflakes. The formation mechanism has been presented. Significantly, the magnetic investigations show that the magnetic properties are strongly shape-dependent. The magnetization measurements of belt-like and flake-like α-Fe2O3 in perpendicular exhibit ferromagnetic feature with the coercivity (Hc) and saturation magnetization (Ms) of 334.5 Oe and 1.35 emu/g, 239.5 Oe and 0.12 emu/g, respectively. For the parallel, belt-like and flake-like α-Fe2O3 also exhibit ferromagnetic feature with the Hc and Ms of 205.5 Oe and 1.44 emu/g, 159.6 Oe and 0.15 emu/g, respectively. |
| Keywords: | Hematite Nanobelts Nanoflakes Magnetic property |
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