| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1653345 | Materials Letters | 2016 | 4 Pages |
Abstract
A weak near-infrared luminescence has been observed for fine-particle Fe2O3 when excited by 1064 nm radiation from a Nd:YAG laser. There are three broad luminescence peaks at 7994, 7225 and 6686 cm− 1, with intensities about 10 times that of the Raman scattering. The relative intensities vary with particle morphology and with heat treatment. Overall band intensities increase by about a factor of 10 for Fe2O3 that has been heated to 500 °C and the decreases again for material that has been heated to 1000 °C. The emission was assigned to the 4T1g→6A1g crystal field transition of octahedral Fe3+. A large Stokes shift is associated with these transitions.
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Authors
Jun Wang, William B. White, James H. Adair,